Fix for When MoreThanOnePriceFound() is raised, plugins dont fire #3840 #3833

changedetectionio/api/Watch.py

@@ -66,47 +66,42 @@ class Watch(Resource):
     @validate_openapi_request('getWatch')
     def get(self, uuid):
         """Get information about a single watch, recheck, pause, or mute."""
-        import time
-        from copy import deepcopy
-        watch = None
-        # Retry up to 20 times if dict is being modified
-        # With sleep(0), this is fast: ~200µs best case, ~20ms worst case under heavy load
-        for attempt in range(20):
-            try:
-                watch = deepcopy(self.datastore.data['watching'].get(uuid))
-                break
-            except RuntimeError:
-                # Dict changed during deepcopy, retry after yielding to scheduler
-                # sleep(0) releases GIL and yields - no fixed delay, just lets other threads run
-                if attempt < 19:  # Don't yield on last attempt
-                    time.sleep(0)  # Yield to scheduler (microseconds, not milliseconds)
-
-        if not watch:
+        # Get watch reference first (for pause/mute operations)
+        watch_obj = self.datastore.data['watching'].get(uuid)
+        if not watch_obj:
             abort(404, message='No watch exists with the UUID of {}'.format(uuid))
 
+        # Create a dict copy for JSON response (with lock for thread safety)
+        # This is much faster than deepcopy and doesn't copy the datastore reference
+        # WARNING: dict() is a SHALLOW copy - nested dicts are shared with original!
+        # Only safe because we only ADD scalar properties (line 97-101), never modify nested dicts
+        # If you need to modify nested dicts, use: from copy import deepcopy; watch = deepcopy(dict(watch_obj))
+        with self.datastore.lock:
+            watch = dict(watch_obj)
+
         if request.args.get('recheck'):
             worker_pool.queue_item_async_safe(self.update_q, queuedWatchMetaData.PrioritizedItem(priority=1, item={'uuid': uuid}))
             return "OK", 200
         if request.args.get('paused', '') == 'paused':
-            self.datastore.data['watching'].get(uuid).pause()
+            watch_obj.pause()
             return "OK", 200
         elif request.args.get('paused', '') == 'unpaused':
-            self.datastore.data['watching'].get(uuid).unpause()
+            watch_obj.unpause()
             return "OK", 200
         if request.args.get('muted', '') == 'muted':
-            self.datastore.data['watching'].get(uuid).mute()
+            watch_obj.mute()
             return "OK", 200
         elif request.args.get('muted', '') == 'unmuted':
-            self.datastore.data['watching'].get(uuid).unmute()
+            watch_obj.unmute()
             return "OK", 200
 
         # Return without history, get that via another API call
         # Properties are not returned as a JSON, so add the required props manually
-        watch['history_n'] = watch.history_n
+        watch['history_n'] = watch_obj.history_n
         # attr .last_changed will check for the last written text snapshot on change
-        watch['last_changed'] = watch.last_changed
-        watch['viewed'] = watch.viewed
-        watch['link'] = watch.link,
+        watch['last_changed'] = watch_obj.last_changed
+        watch['viewed'] = watch_obj.viewed
+        watch['link'] = watch_obj.link,
 
         return watch
 

changedetectionio/blueprint/settings/templates/settings.html

@@ -59,6 +59,14 @@
                         {{ _('Set to') }} <strong>0</strong> {{ _('to disable') }}
                         </span>
                     </div>
+                    <div class="pure-control-group">
+                        {{ render_field(form.application.form.history_snapshot_max_length, class="history_snapshot_max_length") }}
+                        <span class="pure-form-message-inline">{{ _('Limit collection of history snapshots for each watch to this number of history items.') }}
+                            <br>
+                        {{ _('Set to empty to disable / no limit') }}
+                        </span>
+                    </div>
+
                     <div class="pure-control-group">
                         {% if not hide_remove_pass %}
                             {% if current_user.is_authenticated %}

changedetectionio/blueprint/ui/edit.py

@@ -197,7 +197,7 @@ def construct_blueprint(datastore: ChangeDetectionStore, update_q, queuedWatchMe
 
             # Recast it if need be to right data Watch handler
             watch_class = processors.get_custom_watch_obj_for_processor(form.data.get('processor'))
-            datastore.data['watching'][uuid] = watch_class(datastore_path=datastore.datastore_path, default=datastore.data['watching'][uuid])
+            datastore.data['watching'][uuid] = watch_class(datastore_path=datastore.datastore_path, __datastore=datastore.data, default=datastore.data['watching'][uuid])
             flash(gettext("Updated watch - unpaused!") if request.args.get('unpause_on_save') else gettext("Updated watch."))
 
             # Cleanup any browsersteps session for this watch

changedetectionio/blueprint/ui/templates/edit.html

@@ -115,6 +115,13 @@
                          {{ _('Sends a notification when the filter can no longer be seen on the page, good for knowing when the page changed and your filter will not work anymore.') }}
                         </span>
                     </div>
+                    <div class="pure-control-group">
+                        {{ render_field(form.history_snapshot_max_length, class="history_snapshot_max_length") }}
+                        <span class="pure-form-message-inline">{{ _('Limit collection of history snapshots for each watch to this number of history items.') }}
+                        <br>
+                        {{ _('Set to empty to use system settings default') }}
+                        </span>
+                    </div>
                     <div class="pure-control-group">
                         {{ render_ternary_field(form.use_page_title_in_list) }}
                     </div>

changedetectionio/blueprint/watchlist/templates/watch-overview.html

@@ -14,6 +14,46 @@
 // Initialize Feather icons after the page loads
 document.addEventListener('DOMContentLoaded', function() {
     feather.replace();
+
+    // Intersection Observer for lazy loading favicons
+    // Only load favicon images when they enter the viewport
+    if ('IntersectionObserver' in window) {
+        const faviconObserver = new IntersectionObserver((entries, observer) => {
+            entries.forEach(entry => {
+                if (entry.isIntersecting) {
+                    const img = entry.target;
+                    const src = img.getAttribute('data-src');
+
+                    if (src) {
+                        // Load the actual favicon
+                        img.src = src;
+                        img.removeAttribute('data-src');
+                    }
+
+                    // Stop observing this image
+                    observer.unobserve(img);
+                }
+            });
+        }, {
+            // Start loading slightly before the image enters viewport
+            rootMargin: '50px',
+            threshold: 0.01
+        });
+
+        // Observe all lazy favicon images
+        document.querySelectorAll('.lazy-favicon').forEach(img => {
+            faviconObserver.observe(img);
+        });
+    } else {
+        // Fallback for older browsers: load all favicons immediately
+        document.querySelectorAll('.lazy-favicon').forEach(img => {
+            const src = img.getAttribute('data-src');
+            if (src) {
+                img.src = src;
+                img.removeAttribute('data-src');
+            }
+        });
+    }
 });
 </script>
 <style>
@@ -206,8 +246,17 @@ html[data-darkmode="true"] .watch-tag-list.tag-{{ class_name }} {
                 <td class="title-col inline">
                     <div class="flex-wrapper">
                     {% if 'favicons_enabled' not in ui_settings or ui_settings['favicons_enabled'] %}
-                        <div>{# A page might have hundreds of these images, set IMG options for lazy loading, don't set SRC if we dont have it so it doesnt fetch the placeholder'  #}
-                            <img alt="Favicon thumbnail" class="favicon" loading="lazy" decoding="async" fetchpriority="low" {% if favicon %} src="{{url_for('static_content', group='favicon', filename=watch.uuid)}}" {% else %} src='data:image/svg+xml;utf8,%3Csvg xmlns="http://www.w3.org/2000/svg" width="7.087" height="7.087" viewBox="0 0 7.087 7.087"%3E%3Ccircle cx="3.543" cy="3.543" r="3.279" stroke="%23e1e1e1" stroke-width="0.45" fill="none" opacity="0.74"/%3E%3C/svg%3E' {%  endif %} >
+                        <div>
+                            {# Intersection Observer lazy loading: store real URL in data-src, load only when visible in viewport #}
+                            <img alt="Favicon thumbnail"
+                                 class="favicon lazy-favicon"
+                                 loading="lazy"
+                                 decoding="async"
+                                 fetchpriority="low"
+                                 {% if favicon %}
+                                 data-src="{{url_for('static_content', group='favicon', filename=watch.uuid)}}"
+                                 {% endif %}
+                                 src='data:image/svg+xml;utf8,%3Csvg xmlns="http://www.w3.org/2000/svg" width="7.087" height="7.087" viewBox="0 0 7.087 7.087"%3E%3Ccircle cx="3.543" cy="3.543" r="3.279" stroke="%23e1e1e1" stroke-width="0.45" fill="none" opacity="0.74"/%3E%3C/svg%3E'>
                         </div>
                     {%  endif %}
                         <div>

changedetectionio/forms.py

@@ -837,6 +837,8 @@ class processor_text_json_diff_form(commonSettingsForm):
     conditions = FieldList(FormField(ConditionFormRow), min_entries=1)  # Add rule logic here
     use_page_title_in_list = TernaryNoneBooleanField(_l('Use page <title> in list'), default=None)
 
+    history_snapshot_max_length = IntegerField(_l('Number of history items per watch to keep'), render_kw={"style": "width: 5em;"}, validators=[validators.Optional(), validators.NumberRange(min=2)])
+
     def extra_tab_content(self):
         return None
 
@@ -1034,6 +1036,8 @@ class globalSettingsApplicationForm(commonSettingsForm):
                                                                   render_kw={"style": "width: 5em;"},
                                                                   validators=[validators.NumberRange(min=0,
                                                                                                      message=_l("Should contain zero or more attempts"))])
+
+    history_snapshot_max_length = IntegerField(_l('Number of history items per watch to keep'), render_kw={"style": "width: 5em;"}, validators=[validators.Optional(), validators.NumberRange(min=2)])
     ui = FormField(globalSettingsApplicationUIForm)
 
 

changedetectionio/model/App.py

@@ -46,6 +46,7 @@ class model(dict):
                     'filter_failure_notification_threshold_attempts': _FILTER_FAILURE_THRESHOLD_ATTEMPTS_DEFAULT,
                     'global_ignore_text': [], # List of text to ignore when calculating the comparison checksum
                     'global_subtractive_selectors': [],
+                    'history_snapshot_max_length': None,
                     'ignore_whitespace': True,
                     'ignore_status_codes': False, #@todo implement, as ternary.
                     'ssim_threshold': '0.96',  # Default SSIM threshold for screenshot comparison

changedetectionio/model/Tag.py

@@ -5,6 +5,11 @@ from changedetectionio.model import watch_base
 class model(watch_base):
 
     def __init__(self, *arg, **kw):
+        # Store datastore reference (optional for Tags, but good for consistency)
+        self.__datastore = kw.get('__datastore')
+        if kw.get('__datastore'):
+            del kw['__datastore']
+
         super(model, self).__init__(*arg, **kw)
 
         self['overrides_watch'] = kw.get('default', {}).get('overrides_watch')

changedetectionio/model/Watch.py

@@ -1,3 +1,6 @@
+import gc
+from copy import copy
+
 from blinker import signal
 from changedetectionio.validate_url import is_safe_valid_url
 
@@ -13,7 +16,7 @@ from .. import jinja2_custom as safe_jinja
 from ..html_tools import TRANSLATE_WHITESPACE_TABLE
 
 FAVICON_RESAVE_THRESHOLD_SECONDS=86400
-BROTLI_COMPRESS_SIZE_THRESHOLD = int(os.getenv('SNAPSHOT_BROTLI_COMPRESSION_THRESHOLD', 1024))
+BROTLI_COMPRESS_SIZE_THRESHOLD = int(os.getenv('SNAPSHOT_BROTLI_COMPRESSION_THRESHOLD', 1024*20))
 
 minimum_seconds_recheck_time = int(os.getenv('MINIMUM_SECONDS_RECHECK_TIME', 3))
 mtable = {'seconds': 1, 'minutes': 60, 'hours': 3600, 'days': 86400, 'weeks': 86400 * 7}
@@ -109,8 +112,15 @@ class model(watch_base):
         self.__datastore_path = kw.get('datastore_path')
         if kw.get('datastore_path'):
             del kw['datastore_path']
-            
+
+        self.__datastore = kw.get('__datastore')
+        if not self.__datastore:
+            raise ValueError("Watch object requires '__datastore' reference - cannot access global settings without it")
+        if kw.get('__datastore'):
+            del kw['__datastore']
+
         super(model, self).__init__(*arg, **kw)
+
         if kw.get('default'):
             self.update(kw['default'])
             del kw['default']
@@ -121,6 +131,9 @@ class model(watch_base):
         # Be sure the cached timestamp is ready
         bump = self.history
 
+    # Note: __deepcopy__, __getstate__, and __setstate__ are inherited from watch_base
+    # This prevents memory leaks by sharing __datastore reference instead of copying it
+
     @property
     def viewed(self):
         # Don't return viewed when last_viewed is 0 and newest_key is 0
@@ -423,16 +436,49 @@ class model(watch_base):
         with open(filepath, 'r', encoding='utf-8', errors='ignore') as f:
             return f.read()
 
-    def _write_atomic(self, dest, data):
+    def _write_atomic(self, dest, data, mode='wb'):
         """Write data atomically to dest using a temp file"""
-        if not os.path.exists(dest):
-            import tempfile
-            with tempfile.NamedTemporaryFile('wb', delete=False, dir=self.watch_data_dir) as tmp:
-                tmp.write(data)
-                tmp.flush()
-                os.fsync(tmp.fileno())
-                tmp_path = tmp.name
-            os.replace(tmp_path, dest)
+        import tempfile
+        with tempfile.NamedTemporaryFile(mode, delete=False, dir=self.watch_data_dir) as tmp:
+            tmp.write(data)
+            tmp.flush()
+            os.fsync(tmp.fileno())
+            tmp_path = tmp.name
+        os.replace(tmp_path, dest)
+
+    def history_trim(self, newest_n_items):
+        from pathlib import Path
+
+        # Sort by timestamp (key)
+        sorted_items = sorted(self.history.items(), key=lambda x: int(x[0]))
+
+        keep_part = dict(sorted_items[-newest_n_items:])
+        delete_part = dict(sorted_items[:-newest_n_items])
+        logger.info( f"[{self.get('uuid')}] Trimming history to most recent {newest_n_items} items, keeping {len(keep_part)} items deleting {len(delete_part)} items.")
+
+        if delete_part:
+            for item in delete_part.items():
+                try:
+                    Path(item[1]).unlink(missing_ok=True)
+                except Exception as e:
+                    logger.critical(f"{str(e)}")
+                finally:
+                    logger.debug(f"[{self.get('uuid')}] Deleted {item[1]} history snapshot")
+        try:
+            dest = os.path.join(self.watch_data_dir, self.history_index_filename)
+            output = "\r\n".join(
+                f"{k},{Path(v).name}"
+                for k, v in keep_part.items()
+            )+"\r\n"
+            self._write_atomic(dest=dest, data=output, mode='w')
+        except Exception as e:
+            logger.critical(f"{str(e)}")
+        finally:
+            logger.debug(f"[{self.get('uuid')}] Updated history index {dest}")
+
+        # reimport
+        bump = self.history
+        gc.collect()
 
     # Save some text file to the appropriate path and bump the history
     # result_obj from fetch_site_status.run()
@@ -441,7 +487,6 @@ class model(watch_base):
         logger.trace(f"{self.get('uuid')} - Updating {self.history_index_filename} with timestamp {timestamp}")
 
         self.ensure_data_dir_exists()
-
         skip_brotli = strtobool(os.getenv('DISABLE_BROTLI_TEXT_SNAPSHOT', 'False'))
 
         # Binary data - detect file type and save without compression
@@ -501,6 +546,15 @@ class model(watch_base):
         self.__newest_history_key = timestamp
         self.__history_n += 1
 
+
+        maxlen = (
+                self.get('history_snapshot_max_length')
+                or (self.__datastore and self.__datastore['settings']['application'].get('history_snapshot_max_length'))
+        )
+
+        if maxlen and self.__history_n and self.__history_n > maxlen:
+            self.history_trim(newest_n_items=maxlen)
+
         # @todo bump static cache of the last timestamp so we dont need to examine the file to set a proper ''viewed'' status
         return snapshot_fname
 

changedetectionio/model/__init__.py

@@ -32,6 +32,7 @@ class watch_base(dict):
             'filter_text_replaced': True,
             'follow_price_changes': True,
             'has_ldjson_price_data': None,
+            'history_snapshot_max_length': None,
             'headers': {},  # Extra headers to send
             'ignore_text': [],  # List of text to ignore when calculating the comparison checksum
             'ignore_status_codes': None,
@@ -139,4 +140,100 @@ class watch_base(dict):
         super(watch_base, self).__init__(*arg, **kw)
 
         if self.get('default'):
-            del self['default']
+            del self['default']
+
+    def __deepcopy__(self, memo):
+        """
+        Custom deepcopy for all watch_base subclasses (Watch, Tag, etc.).
+
+        CRITICAL FIX: Prevents copying large reference objects like __datastore
+        which would cause exponential memory growth when Watch objects are deepcopied.
+
+        This is called by:
+        - api/Watch.py:76 (API endpoint)
+        - api/Tags.py:28 (Tags API)
+        - processors/base.py:26 (EVERY processor run)
+        - store/__init__.py:544 (clone watch)
+        - And other locations
+        """
+        from copy import deepcopy
+
+        # Create new instance without calling __init__
+        cls = self.__class__
+        new_obj = cls.__new__(cls)
+        memo[id(self)] = new_obj
+
+        # Copy the dict data (all the settings)
+        for key, value in self.items():
+            new_obj[key] = deepcopy(value, memo)
+
+        # Copy instance attributes dynamically
+        # This handles Watch-specific attrs (like __datastore) and any future subclass attrs
+        for attr_name in dir(self):
+            # Skip methods, special attrs, and dict keys
+            if attr_name.startswith('_') and not attr_name.startswith('__'):
+                # This catches _model__datastore, _model__history_n, etc.
+                try:
+                    attr_value = getattr(self, attr_name)
+
+                    # Special handling: Share references to large objects instead of copying
+                    # Examples: __datastore, __app_reference, __global_settings, etc.
+                    if attr_name.endswith('__datastore') or attr_name.endswith('__app'):
+                        # Share the reference (don't copy!) to prevent memory leaks
+                        setattr(new_obj, attr_name, attr_value)
+                    # Skip cache attributes - let them regenerate on demand
+                    elif 'cache' in attr_name.lower():
+                        pass  # Don't copy caches
+                    # Copy regular instance attributes
+                    elif not callable(attr_value):
+                        setattr(new_obj, attr_name, attr_value)
+                except AttributeError:
+                    pass  # Attribute doesn't exist in this instance
+
+        return new_obj
+
+    def __getstate__(self):
+        """
+        Custom pickle serialization for all watch_base subclasses.
+
+        Excludes large reference objects (like __datastore) from serialization.
+        """
+        # Get the dict data
+        state = dict(self)
+
+        # Collect instance attributes (excluding methods and large references)
+        instance_attrs = {}
+        for attr_name in dir(self):
+            if attr_name.startswith('_') and not attr_name.startswith('__'):
+                try:
+                    attr_value = getattr(self, attr_name)
+                    # Exclude large reference objects and caches from serialization
+                    if not (attr_name.endswith('__datastore') or
+                           attr_name.endswith('__app') or
+                           'cache' in attr_name.lower() or
+                           callable(attr_value)):
+                        instance_attrs[attr_name] = attr_value
+                except AttributeError:
+                    pass
+
+        if instance_attrs:
+            state['__instance_metadata__'] = instance_attrs
+
+        return state
+
+    def __setstate__(self, state):
+        """
+        Custom pickle deserialization for all watch_base subclasses.
+
+        WARNING: Large reference objects (like __datastore) are NOT restored!
+        Caller must restore these references after unpickling if needed.
+        """
+        # Extract metadata
+        metadata = state.pop('__instance_metadata__', {})
+
+        # Restore dict data
+        self.update(state)
+
+        # Restore instance attributes
+        for attr_name, attr_value in metadata.items():
+            setattr(self, attr_name, attr_value)

changedetectionio/processors/base.py

@@ -23,7 +23,14 @@ class difference_detection_processor():
     def __init__(self, datastore, watch_uuid):
         self.datastore = datastore
         self.watch_uuid = watch_uuid
+
+        # Create a stable snapshot of the watch for processing
+        # Why deepcopy?
+        # 1. Prevents "dict changed during iteration" errors if watch is modified during processing
+        # 2. Preserves Watch object with properties (.link, .is_pdf, etc.) - can't use dict()
+        # 3. Safe now: Watch.__deepcopy__() shares datastore ref (no memory leak) but copies dict data
         self.watch = deepcopy(self.datastore.data['watching'].get(watch_uuid))
+
         # Generic fetcher that should be extended (requests, playwright etc)
         self.fetcher = Fetcher()
 

changedetectionio/processors/restock_diff/processor.py

@@ -193,18 +193,17 @@ class perform_site_check(difference_detection_processor):
 
 
         itemprop_availability = {}
+        multiple_prices_found = False
 
         # Try built-in extraction first, this will scan metadata in the HTML
         try:
             itemprop_availability = get_itemprop_availability(self.fetcher.content)
         except MoreThanOnePriceFound as e:
-            # Add the real data
-            raise ProcessorException(message="Cannot run, more than one price detected, this plugin is only for product pages with ONE product, try the content-change detection mode.",
-                                     url=watch.get('url'),
-                                     status_code=self.fetcher.get_last_status_code(),
-                                     screenshot=self.fetcher.screenshot,
-                                     xpath_data=self.fetcher.xpath_data
-                                     )
+            # Don't raise immediately - let plugins try to handle this case
+            # Plugins might be able to determine which price is correct
+            logger.warning(f"Built-in detection found multiple prices on {watch.get('url')}, will try plugin override")
+            multiple_prices_found = True
+            itemprop_availability = {}
 
         # If built-in extraction didn't get both price AND availability, try plugin override
         # Only check plugin if this watch is using a fetcher that might provide better data
@@ -216,9 +215,21 @@ class perform_site_check(difference_detection_processor):
             from changedetectionio.pluggy_interface import get_itemprop_availability_from_plugin
             fetcher_name = watch.get('fetch_backend', 'html_requests')
 
-            # Only try plugin override if not using system default (which might be anything)
-            if fetcher_name and fetcher_name != 'system':
-                logger.debug("Calling extra plugins for getting item price/availability")
+            # Resolve 'system' to the actual fetcher being used
+            # This allows plugins to work even when watch uses "system settings default"
+            if fetcher_name == 'system':
+                # Get the actual fetcher that was used (from self.fetcher)
+                # Fetcher class name gives us the actual backend (e.g., 'html_requests', 'html_webdriver')
+                actual_fetcher = type(self.fetcher).__name__
+                if 'html_requests' in actual_fetcher.lower():
+                    fetcher_name = 'html_requests'
+                elif 'webdriver' in actual_fetcher.lower() or 'playwright' in actual_fetcher.lower():
+                    fetcher_name = 'html_webdriver'
+                logger.debug(f"Resolved 'system' fetcher to actual fetcher: {fetcher_name}")
+
+            # Try plugin override - plugins can decide if they support this fetcher
+            if fetcher_name:
+                logger.debug(f"Calling extra plugins for getting item price/availability (fetcher: {fetcher_name})")
                 plugin_availability = get_itemprop_availability_from_plugin(self.fetcher.content, fetcher_name, self.fetcher, watch.link)
 
                 if plugin_availability:
@@ -233,6 +244,16 @@ class perform_site_check(difference_detection_processor):
                 if not plugin_availability:
                     logger.debug("No item price/availability from plugins")
 
+        # If we had multiple prices and plugins also failed, NOW raise the exception
+        if multiple_prices_found and not itemprop_availability.get('price'):
+            raise ProcessorException(
+                message="Cannot run, more than one price detected, this plugin is only for product pages with ONE product, try the content-change detection mode.",
+                url=watch.get('url'),
+                status_code=self.fetcher.get_last_status_code(),
+                screenshot=self.fetcher.screenshot,
+                xpath_data=self.fetcher.xpath_data
+            )
+
         # Something valid in get_itemprop_availability() by scraping metadata ?
         if itemprop_availability.get('price') or itemprop_availability.get('availability'):
             # Store for other usage

changedetectionio/processors/text_json_diff/__init__.py

@@ -64,7 +64,7 @@ def prepare_filter_prevew(datastore, watch_uuid, form_data):
         # Only update vars that came in via the AJAX post
         p = {k: v for k, v in form.data.items() if k in form_data.keys()}
         tmp_watch.update(p)
-        blank_watch_no_filters = watch_model()
+        blank_watch_no_filters = watch_model(datastore_path=datastore.datastore_path, __datastore=datastore.data)
         blank_watch_no_filters['url'] = tmp_watch.get('url')
 
         latest_filename = next(reversed(tmp_watch.history))

changedetectionio/run_basic_tests.sh

@@ -67,7 +67,7 @@ echo "-------------------- Running rest of tests in parallel -------------------
 # REMOVE_REQUESTS_OLD_SCREENSHOTS disabled so that we can write a screenshot and send it in test_notifications.py without a real browser
 FETCH_WORKERS=2 REMOVE_REQUESTS_OLD_SCREENSHOTS=false \
 pytest tests/test_*.py \
-  -n 18 \
+  -n 8 \
   --dist=load \
   -vvv \
   -s \

changedetectionio/store/__init__.py

@@ -9,18 +9,14 @@ from flask import (
 )
 from flask_babel import gettext
 
-from ..blueprint.rss import RSS_CONTENT_FORMAT_DEFAULT
-from ..html_tools import TRANSLATE_WHITESPACE_TABLE
-from ..model import App, Watch, USE_SYSTEM_DEFAULT_NOTIFICATION_FORMAT_FOR_WATCH
-from copy import deepcopy, copy
+from ..model import App, Watch
+from copy import deepcopy
 from os import path, unlink
-from threading import Lock
 import json
 import os
 import re
 import secrets
 import sys
-import threading
 import time
 import uuid as uuid_builder
 from loguru import logger
@@ -35,7 +31,6 @@ except ImportError:
     HAS_ORJSON = False
 
 from ..processors import get_custom_watch_obj_for_processor
-from ..processors.restock_diff import Restock
 
 # Import the base class and helpers
 from .file_saving_datastore import FileSavingDataStore, load_all_watches, save_watch_atomic, save_json_atomic
@@ -137,6 +132,19 @@ class ChangeDetectionStore(DatastoreUpdatesMixin, FileSavingDataStore):
             )
             logger.info(f"Tag: {uuid} {tag['title']}")
 
+    def _rehydrate_watches(self):
+        """Rehydrate watch entities from stored data (converts dicts to Watch objects)."""
+        watch_count = len(self.__data.get('watching', {}))
+        if watch_count == 0:
+            return
+
+        logger.info(f"Rehydrating {watch_count} watches...")
+        watching_rehydrated = {}
+        for uuid, watch_dict in self.__data.get('watching', {}).items():
+            watching_rehydrated[uuid] = self.rehydrate_entity(uuid, watch_dict)
+        self.__data['watching'] = watching_rehydrated
+        logger.success(f"Rehydrated {watch_count} watches into Watch objects")
+
 
     def _load_state(self):
         """
@@ -174,7 +182,7 @@ class ChangeDetectionStore(DatastoreUpdatesMixin, FileSavingDataStore):
         self.json_store_path = os.path.join(self.datastore_path, "changedetection.json")
 
         # Base definition for all watchers (deepcopy part of #569)
-        self.generic_definition = deepcopy(Watch.model(datastore_path=datastore_path, default={}))
+        self.generic_definition = deepcopy(Watch.model(datastore_path=datastore_path, __datastore=self.__data, default={}))
 
         # Load build SHA if available (Docker deployments)
         if path.isfile('changedetectionio/source.txt'):
@@ -218,23 +226,29 @@ class ChangeDetectionStore(DatastoreUpdatesMixin, FileSavingDataStore):
                 logger.critical(f"Legacy datastore detected at {self.datastore_path}/url-watches.json")
                 logger.critical("Migration will be triggered via update_26")
 
-                # Load the legacy datastore to get its schema_version
+                # Load the legacy datastore
                 from .legacy_loader import load_legacy_format
                 legacy_path = os.path.join(self.datastore_path, "url-watches.json")
-                with open(legacy_path) as f:
-                    self.__data = json.load(f)
+                legacy_data = load_legacy_format(legacy_path)
 
-                if not self.__data:
+                if not legacy_data:
                     raise Exception("Failed to load legacy datastore from url-watches.json")
 
-                # update_26 will load the legacy data again and migrate to new format
-                # Only run updates AFTER the legacy schema version (e.g., if legacy is at 25, only run 26+)
+                # Store the loaded data
+                self.__data = legacy_data
+
+                # CRITICAL: Rehydrate watches from dicts into Watch objects
+                # This ensures watches have their methods available during migration
+                self._rehydrate_watches()
+
+                # update_26 will save watches to individual files and create changedetection.json
+                # Next startup will load from new format normally
                 self.run_updates()
 
 
             else:
                 # Fresh install - create new datastore
-                logger.critical(f"No datastore found, creating new datastore at {self.datastore_path}")
+                logger.warning(f"No datastore found, creating new datastore at {self.datastore_path}")
 
                 # Set schema version to latest (no updates needed)
                 updates_available = self.get_updates_available()
@@ -308,7 +322,7 @@ class ChangeDetectionStore(DatastoreUpdatesMixin, FileSavingDataStore):
         if entity.get('processor') != 'text_json_diff':
             logger.trace(f"Loading Watch object '{watch_class.__module__}.{watch_class.__name__}' for UUID {uuid}")
 
-        entity = watch_class(datastore_path=self.datastore_path, default=entity)
+        entity = watch_class(datastore_path=self.datastore_path, __datastore=self.__data, default=entity)
         return entity
 
     # ============================================================================
@@ -527,7 +541,11 @@ class ChangeDetectionStore(DatastoreUpdatesMixin, FileSavingDataStore):
     # Clone a watch by UUID
     def clone(self, uuid):
         url = self.data['watching'][uuid].get('url')
-        extras = deepcopy(self.data['watching'][uuid])
+        # No need to deepcopy here - add_watch() will deepcopy extras anyway (line 569)
+        # Just pass a dict copy (with lock for thread safety)
+        # NOTE: dict() is shallow copy but safe since add_watch() deepcopies it
+        with self.lock:
+            extras = dict(self.data['watching'][uuid])
         new_uuid = self.add_watch(url=url, extras=extras)
         watch = self.data['watching'][new_uuid]
         return new_uuid
@@ -639,7 +657,7 @@ class ChangeDetectionStore(DatastoreUpdatesMixin, FileSavingDataStore):
 
         # If the processor also has its own Watch implementation
         watch_class = get_custom_watch_obj_for_processor(apply_extras.get('processor'))
-        new_watch = watch_class(datastore_path=self.datastore_path, url=url)
+        new_watch = watch_class(datastore_path=self.datastore_path, __datastore=self.__data, url=url)
 
         new_uuid = new_watch.get('uuid')
 
@@ -858,10 +876,14 @@ class ChangeDetectionStore(DatastoreUpdatesMixin, FileSavingDataStore):
         # So we use the same model as a Watch
         with self.lock:
             from ..model import Tag
-            new_tag = Tag.model(datastore_path=self.datastore_path, default={
-                'title': title.strip(),
-                'date_created': int(time.time())
-            })
+            new_tag = Tag.model(
+                datastore_path=self.datastore_path,
+                __datastore=self.__data,
+                default={
+                    'title': title.strip(),
+                    'date_created': int(time.time())
+                }
+            )
 
             new_uuid = new_tag.get('uuid')
 

changedetectionio/tests/test_history_consistency.py

@@ -182,3 +182,86 @@ def test_check_text_history_view(client, live_server, measure_memory_usage, data
     assert b'test-one' not in res.data
 
     delete_all_watches(client)
+
+
+def test_history_trim_global_only(client, live_server, measure_memory_usage, datastore_path):
+    # Add our URL to the import page
+    test_url = url_for('test_endpoint', _external=True)
+    uuid = None
+    limit = 3
+
+    for i in range(0, 10):
+        with open(os.path.join(datastore_path, "endpoint-content.txt"), "w") as f:
+            f.write(f"<html>test {i}</html>")
+        if not uuid:
+            uuid = client.application.config.get('DATASTORE').add_watch(url=test_url)
+        client.get(url_for("ui.form_watch_checknow"), follow_redirects=True)
+        wait_for_all_checks(client)
+
+        if i ==8:
+            watch = live_server.app.config['DATASTORE'].data['watching'][uuid]
+            history_n = len(list(watch.history.keys()))
+            logger.debug(f"History length should be at limit {limit} and it is {history_n}")
+            assert history_n == limit
+
+        if i == 6:
+            res = client.post(
+                url_for("settings.settings_page"),
+                data={"application-history_snapshot_max_length": limit},
+                follow_redirects=True
+            )
+            # It will need to detect one more change to start trimming it, which is really at 'start of 7'
+            assert b'Settings updated' in res.data
+
+    delete_all_watches(client)
+
+
+def test_history_trim_global_override_in_watch(client, live_server, measure_memory_usage, datastore_path):
+    # Add our URL to the import page
+    test_url = url_for('test_endpoint', _external=True)
+    uuid = None
+    limit = 3
+    res = client.post(
+        url_for("settings.settings_page"),
+        data={"application-history_snapshot_max_length": 10000},
+        follow_redirects=True
+    )
+    # It will need to detect one more change to start trimming it, which is really at 'start of 7'
+    assert b'Settings updated' in res.data
+
+
+    for i in range(0, 10):
+        with open(os.path.join(datastore_path, "endpoint-content.txt"), "w") as f:
+            f.write(f"<html>test {i}</html>")
+        if not uuid:
+            uuid = client.application.config.get('DATASTORE').add_watch(url=test_url)
+            res = client.post(
+                url_for("ui.ui_edit.edit_page", uuid="first"),
+                data={"include_filters": "", "url": test_url, "tags": "", "headers": "", 'fetch_backend': "html_requests",
+                      "time_between_check_use_default": "y", "history_snapshot_max_length": str(limit)},
+                follow_redirects=True
+            )
+            assert b"Updated watch." in res.data
+
+            wait_for_all_checks(client)
+
+        client.get(url_for("ui.form_watch_checknow"), follow_redirects=True)
+        wait_for_all_checks(client)
+
+        if i == 8:
+            watch = live_server.app.config['DATASTORE'].data['watching'][uuid]
+            history_n = len(list(watch.history.keys()))
+            logger.debug(f"History length should be at limit {limit} and it is {history_n}")
+            assert history_n == limit
+
+        if i == 6:
+            res = client.post(
+                url_for("settings.settings_page"),
+                data={"application-history_snapshot_max_length": limit},
+                follow_redirects=True
+            )
+            # It will need to detect one more change to start trimming it, which is really at 'start of 7'
+            assert b'Settings updated' in res.data
+
+    delete_all_watches(client)
+

changedetectionio/tests/unit/test_watch_model.py

@@ -5,15 +5,24 @@
 
 import unittest
 import os
+import pickle
+from copy import deepcopy
 
-from changedetectionio.model import Watch
+from changedetectionio.model import Watch, Tag
 
 # mostly
 class TestDiffBuilder(unittest.TestCase):
 
     def test_watch_get_suggested_from_diff_timestamp(self):
         import uuid as uuid_builder
-        watch = Watch.model(datastore_path='/tmp', default={})
+        # Create minimal mock datastore for tests
+        mock_datastore = {
+            'settings': {
+                'application': {}
+            },
+            'watching': {}
+        }
+        watch = Watch.model(datastore_path='/tmp', __datastore=mock_datastore, default={})
         watch.ensure_data_dir_exists()
 
 
@@ -49,7 +58,7 @@ class TestDiffBuilder(unittest.TestCase):
         assert p == "109", "Correct when its the same time"
 
         # new empty one
-        watch = Watch.model(datastore_path='/tmp', default={})
+        watch = Watch.model(datastore_path='/tmp', __datastore=mock_datastore, default={})
         p = watch.get_from_version_based_on_last_viewed
         assert p == None, "None when no history available"
 
@@ -61,5 +70,184 @@ class TestDiffBuilder(unittest.TestCase):
         p = watch.get_from_version_based_on_last_viewed
         assert p == "100", "Correct with only one history snapshot"
 
+    def test_watch_deepcopy_doesnt_copy_datastore(self):
+        """
+        CRITICAL: Ensure deepcopy(watch) shares __datastore instead of copying it.
+
+        Without this, deepcopy causes exponential memory growth:
+        - 100 watches × deepcopy each = 10,000 watch objects in memory (100²)
+        - Memory grows from 120MB → 2GB
+
+        This test prevents regressions in the __deepcopy__ implementation.
+        """
+        # Create mock datastore with multiple watches
+        mock_datastore = {
+            'settings': {'application': {'history_snapshot_max_length': 10}},
+            'watching': {}
+        }
+
+        # Create 3 watches that all reference the same datastore
+        watches = []
+        for i in range(3):
+            watch = Watch.model(
+                __datastore=mock_datastore,
+                datastore_path='/tmp/test',
+                default={'url': f'https://example{i}.com', 'title': f'Watch {i}'}
+            )
+            mock_datastore['watching'][watch['uuid']] = watch
+            watches.append(watch)
+
+        # Test 1: Deepcopy shares datastore reference (doesn't copy it)
+        watch_copy = deepcopy(watches[0])
+
+        self.assertIsNotNone(watch_copy._model__datastore,
+                            "__datastore should exist in copied watch")
+        self.assertIs(watch_copy._model__datastore, watches[0]._model__datastore,
+                     "__datastore should be SHARED (same object), not copied")
+        self.assertIs(watch_copy._model__datastore, mock_datastore,
+                     "__datastore should reference the original datastore")
+
+        # Test 2: Dict data is properly copied (not shared)
+        self.assertEqual(watch_copy['title'], 'Watch 0', "Dict data should be copied")
+        watch_copy['title'] = 'MODIFIED'
+        self.assertNotEqual(watches[0]['title'], 'MODIFIED',
+                           "Modifying copy should not affect original")
+
+        # Test 3: Verify no nested datastore copies in watch dict
+        # The dict should only contain watch settings, not the datastore
+        watch_dict = dict(watch_copy)
+        self.assertNotIn('__datastore', watch_dict,
+                        "__datastore should not be in dict keys")
+        self.assertNotIn('_model__datastore', watch_dict,
+                        "_model__datastore should not be in dict keys")
+
+        # Test 4: Multiple deepcopies don't cause exponential memory growth
+        # If datastore was copied, each copy would contain 3 watches,
+        # and those watches would contain the datastore, etc. (infinite recursion)
+        copies = []
+        for _ in range(5):
+            copies.append(deepcopy(watches[0]))
+
+        # All copies should share the same datastore
+        for copy in copies:
+            self.assertIs(copy._model__datastore, mock_datastore,
+                         "All copies should share the original datastore")
+
+    def test_watch_pickle_doesnt_serialize_datastore(self):
+        """
+        Ensure pickle/unpickle doesn't serialize __datastore.
+
+        This is important for multiprocessing and caching - we don't want
+        to serialize the entire datastore when pickling a watch.
+        """
+        mock_datastore = {
+            'settings': {'application': {}},
+            'watching': {}
+        }
+
+        watch = Watch.model(
+            __datastore=mock_datastore,
+            datastore_path='/tmp/test',
+            default={'url': 'https://example.com', 'title': 'Test Watch'}
+        )
+
+        # Pickle and unpickle
+        pickled = pickle.dumps(watch)
+        unpickled_watch = pickle.loads(pickled)
+
+        # Test 1: Watch data is preserved
+        self.assertEqual(unpickled_watch['url'], 'https://example.com',
+                        "Dict data should be preserved after pickle/unpickle")
+
+        # Test 2: __datastore is NOT serialized (attribute shouldn't exist after unpickle)
+        self.assertFalse(hasattr(unpickled_watch, '_model__datastore'),
+                         "__datastore attribute should not exist after unpickle (not serialized)")
+
+        # Test 3: Pickled data shouldn't contain the large datastore object
+        # If datastore was serialized, the pickle size would be much larger
+        pickle_size = len(pickled)
+        # A single watch should be small (< 10KB), not include entire datastore
+        self.assertLess(pickle_size, 10000,
+                       f"Pickled watch too large ({pickle_size} bytes) - might include datastore")
+
+    def test_tag_deepcopy_works(self):
+        """
+        Ensure Tag objects (which also inherit from watch_base) can be deepcopied.
+
+        Tags now have optional __datastore for consistency with Watch objects.
+        """
+        mock_datastore = {
+            'settings': {'application': {}},
+            'watching': {}
+        }
+
+        # Test 1: Tag without datastore (backward compatibility)
+        tag_without_ds = Tag.model(
+            datastore_path='/tmp/test',
+            default={'title': 'Test Tag', 'overrides_watch': True}
+        )
+        tag_copy1 = deepcopy(tag_without_ds)
+        self.assertEqual(tag_copy1['title'], 'Test Tag', "Tag data should be copied")
+
+        # Test 2: Tag with datastore (new pattern for consistency)
+        tag_with_ds = Tag.model(
+            datastore_path='/tmp/test',
+            __datastore=mock_datastore,
+            default={'title': 'Test Tag With DS', 'overrides_watch': True}
+        )
+
+        # Deepcopy should work
+        tag_copy2 = deepcopy(tag_with_ds)
+
+        # Test 3: Dict data is copied
+        self.assertEqual(tag_copy2['title'], 'Test Tag With DS', "Tag data should be copied")
+
+        # Test 4: Modifications to copy don't affect original
+        tag_copy2['title'] = 'MODIFIED'
+        self.assertNotEqual(tag_with_ds['title'], 'MODIFIED',
+                           "Modifying copy should not affect original")
+
+        # Test 5: Tag with datastore shares it (doesn't copy it)
+        if hasattr(tag_with_ds, '_model__datastore'):
+            self.assertIs(tag_copy2._model__datastore, tag_with_ds._model__datastore,
+                         "Tag should share __datastore reference like Watch does")
+
+    def test_watch_copy_performance(self):
+        """
+        Verify that our __deepcopy__ implementation doesn't cause performance issues.
+
+        With the fix, deepcopy should be fast because we're sharing datastore
+        instead of copying it.
+        """
+        import time
+
+        # Create a watch with large datastore (many watches)
+        mock_datastore = {
+            'settings': {'application': {}},
+            'watching': {}
+        }
+
+        # Add 100 watches to the datastore
+        for i in range(100):
+            w = Watch.model(
+                __datastore=mock_datastore,
+                datastore_path='/tmp/test',
+                default={'url': f'https://example{i}.com'}
+            )
+            mock_datastore['watching'][w['uuid']] = w
+
+        # Time how long deepcopy takes
+        watch = list(mock_datastore['watching'].values())[0]
+
+        start = time.time()
+        for _ in range(10):
+            _ = deepcopy(watch)
+        elapsed = time.time() - start
+
+        # Should be fast (< 0.1 seconds for 10 copies)
+        # If datastore was copied, it would take much longer
+        self.assertLess(elapsed, 0.5,
+                       f"Deepcopy too slow ({elapsed:.3f}s for 10 copies) - might be copying datastore")
+
 if __name__ == '__main__':
     unittest.main()

changedetectionio/translations/cs/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-02 11:40+0100\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: cs\n"
@@ -327,6 +327,14 @@ msgstr "Nastavit na"
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -345,6 +353,10 @@ msgstr ""
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr "Vyberte výchozí proxy pro všechny monitory"
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -654,10 +666,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr "Vyberte výchozí proxy pro všechny monitory"
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr "Verze Pythonu:"
@@ -983,7 +991,12 @@ msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
 msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
@@ -1232,6 +1245,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr ""
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr ""
@@ -1580,6 +1597,18 @@ msgstr "zobrazeno <b>{start} - {end}</b> {record_name} z celkem <b>{total}</b>"
 msgid "records"
 msgstr "záznamy"
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr "Více informací"
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr "Přidejte nové monitory zjišťování změn webové stránky"
@@ -1592,18 +1621,6 @@ msgstr "Monitorovat tuto URL!"
 msgid "Edit first then Watch"
 msgstr "Upravit a monitorovat"
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr "Vytvořte odkaz ke sdílení"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr "Tip: Můžete také přidat „sdílené“ monitory."
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr "Více informací"
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr "Pauza"
@@ -2117,6 +2134,10 @@ msgstr "Přiřaďte kteroukoli z následujících možností"
 msgid "Use page <title> in list"
 msgstr "V seznamu použijte stránku <title>"
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr "Když je metoda požadavku nastavena na GET, tělo musí být prázdné"
@@ -2439,15 +2460,20 @@ msgstr "Změny textu webové stránky/HTML, JSON a PDF"
 msgid "Detects all text changes where possible"
 msgstr "Detekuje všechny změny textu, kde je to možné"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr ""
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr "Tělo pro všechna oznámení — Můžete použít"
@@ -3056,3 +3082,12 @@ msgstr "Hlavní nastavení"
 #~ msgid "Cleared snapshot history for all watches"
 #~ msgstr "Vymazat/resetovat historii"
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr ""
+
+#~ msgid "Create a shareable link"
+#~ msgstr "Vytvořte odkaz ke sdílení"
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr "Tip: Můžete také přidat „sdílené“ monitory."
+

changedetectionio/translations/de/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-14 03:57+0100\n"
 "Last-Translator: \n"
 "Language: de\n"
@@ -333,6 +333,14 @@ msgstr "Setzen auf"
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -351,6 +359,10 @@ msgstr ""
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr "Wählen Sie einen Standard-Proxy für alle Überwachungen"
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -664,10 +676,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr "Wählen Sie einen Standard-Proxy für alle Überwachungen"
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr "Python-Version:"
@@ -999,8 +1007,13 @@ msgstr "In den Modus {} gewechselt."
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
-msgstr "Das Bearbeitungsformular für den Prozessor/das Plugin „{}“ kann nicht geladen werden. Fehlt das Plugin?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
+msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 msgid "Updated watch - unpaused!"
@@ -1254,6 +1267,10 @@ msgstr ""
 "Sendet eine Benachrichtigung, wenn der Filter auf der Seite nicht mehr sichtbar ist. So wissen Sie, wann sich die "
 "Seite geändert hat und Ihr Filter nicht mehr funktioniert."
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr "Methode (default), bei der Ihre überwachte Website kein Javascript zum Rendern benötigt."
@@ -1618,6 +1635,18 @@ msgstr "zeige <b>{start} - {end}</b> {record_name} von insgesamt <b>{total}</b>"
 msgid "records"
 msgstr "Einträge"
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr "Weitere Informationen"
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr "Fügen Sie eine neue Überwachung zur Erkennung von Webseitenänderungen hinzu"
@@ -1630,18 +1659,6 @@ msgstr "Diese URL überwachen!"
 msgid "Edit first then Watch"
 msgstr "Bearbeiten > Überwachen"
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr "Erstellen Sie einen Link zum Teilen"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr "Tipp: Sie können auch „gemeinsame“ Überwachungen hinzufügen."
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr "Weitere Informationen"
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr "Pause"
@@ -2162,6 +2179,10 @@ msgstr "Entspricht einer der folgenden Bedingungen"
 msgid "Use page <title> in list"
 msgstr "Verwenden Sie Seite <Titel> in der Liste"
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr "Der Textkörper muss leer sein, wenn die Anforderungsmethode auf GET gesetzt ist"
@@ -2486,15 +2507,20 @@ msgstr "Änderungen an Webseitentext/HTML, JSON und PDF"
 msgid "Detects all text changes where possible"
 msgstr "Erkennt nach Möglichkeit alle Textänderungen"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr "Fehler beim Abrufen der Metadaten für {}"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr "Das Protokoll wird nicht unterstützt oder das URL-Format ist ungültig."
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr "Inhalt für alle Benachrichtigungen — Sie können verwenden"
@@ -3171,3 +3197,12 @@ msgstr "Haupteinstellungen"
 #~ msgid "No watches available to recheck."
 #~ msgstr "Keine Überwachungen verfügbar, um erneut zu überprüfen."
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr "Das Bearbeitungsformular für den Prozessor/das Plugin „{}“ kann nicht geladen werden. Fehlt das Plugin?"
+
+#~ msgid "Create a shareable link"
+#~ msgstr "Erstellen Sie einen Link zum Teilen"
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr "Tipp: Sie können auch „gemeinsame“ Überwachungen hinzufügen."
+

changedetectionio/translations/en_GB/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version:  changedetection.io\n"
 "Report-Msgid-Bugs-To: https://github.com/dgtlmoon/changedetection.io\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-12 16:33+0100\n"
 "Last-Translator: British English Translation Team\n"
 "Language: en_GB\n"
@@ -325,6 +325,14 @@ msgstr ""
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -341,6 +349,10 @@ msgstr ""
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -650,10 +662,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr ""
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr ""
@@ -979,7 +987,12 @@ msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
 msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
@@ -1228,6 +1241,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr ""
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr ""
@@ -1576,6 +1593,18 @@ msgstr ""
 msgid "records"
 msgstr ""
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr ""
@@ -1588,18 +1617,6 @@ msgstr ""
 msgid "Edit first then Watch"
 msgstr ""
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr ""
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr ""
@@ -2113,6 +2130,10 @@ msgstr ""
 msgid "Use page <title> in list"
 msgstr ""
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr ""
@@ -2435,15 +2456,20 @@ msgstr ""
 msgid "Detects all text changes where possible"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr ""
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr ""
@@ -3001,3 +3027,12 @@ msgstr ""
 #~ msgid "No watches available to recheck."
 #~ msgstr ""
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr ""
+
+#~ msgid "Create a shareable link"
+#~ msgstr ""
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr ""
+

changedetectionio/translations/en_US/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: https://github.com/dgtlmoon/changedetection.io\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-12 16:37+0100\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: en_US\n"
@@ -325,6 +325,14 @@ msgstr ""
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -341,6 +349,10 @@ msgstr ""
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -650,10 +662,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr ""
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr ""
@@ -979,7 +987,12 @@ msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
 msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
@@ -1228,6 +1241,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr ""
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr ""
@@ -1576,6 +1593,18 @@ msgstr ""
 msgid "records"
 msgstr ""
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr ""
@@ -1588,18 +1617,6 @@ msgstr ""
 msgid "Edit first then Watch"
 msgstr ""
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr ""
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr ""
@@ -2113,6 +2130,10 @@ msgstr ""
 msgid "Use page <title> in list"
 msgstr ""
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr ""
@@ -2435,15 +2456,20 @@ msgstr ""
 msgid "Detects all text changes where possible"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr ""
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr ""
@@ -3001,3 +3027,12 @@ msgstr ""
 #~ msgid "No watches available to recheck."
 #~ msgstr ""
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr ""
+
+#~ msgid "Create a shareable link"
+#~ msgstr ""
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr ""
+

changedetectionio/translations/fr/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-02 11:40+0100\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: fr\n"
@@ -327,6 +327,14 @@ msgstr "Définir à"
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -345,6 +353,10 @@ msgstr ""
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr "Choisir un proxy par défaut pour tous les moniteurs"
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -654,10 +666,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr "Choisir un proxy par défaut pour tous les moniteurs"
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr "Version Python :"
@@ -983,7 +991,12 @@ msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
 msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
@@ -1234,6 +1247,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr ""
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr ""
@@ -1582,6 +1599,18 @@ msgstr "affichage de <b>{start} - {end}</b> {record_name} sur un total de <b>{to
 msgid "records"
 msgstr "enregistrements"
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr "Plus d'informations"
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr "Ajouter une nouvelle surveillance de détection de changement de page Web"
@@ -1594,18 +1623,6 @@ msgstr "Surveillez cette URL !"
 msgid "Edit first then Watch"
 msgstr "Modifier > Surveiller"
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr "Créer un lien partageable"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr "Astuce : Vous pouvez également ajouter des montres « partagées »."
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr "Plus d'informations"
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr "Pause"
@@ -2123,6 +2140,10 @@ msgstr "Faites correspondre l'un des éléments suivants"
 msgid "Use page <title> in list"
 msgstr "Utiliser la page <titre> dans la liste"
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr "Le corps doit être vide lorsque la méthode de requête est définie sur GET"
@@ -2445,15 +2466,20 @@ msgstr "Modifications du texte de la page Web/HTML, JSON et PDF"
 msgid "Detects all text changes where possible"
 msgstr "Détecte toutes les modifications de texte lorsque cela est possible"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr ""
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr "Corps pour toutes les notifications — Vous pouvez utiliser"
@@ -3064,3 +3090,12 @@ msgstr "Paramètres principaux"
 #~ msgid "Cleared snapshot history for all watches"
 #~ msgstr "Effacer/réinitialiser l'historique"
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr ""
+
+#~ msgid "Create a shareable link"
+#~ msgstr "Créer un lien partageable"
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr "Astuce : Vous pouvez également ajouter des montres « partagées »."
+

changedetectionio/translations/it/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-02 15:32+0100\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: it\n"
@@ -327,6 +327,14 @@ msgstr ""
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -343,6 +351,10 @@ msgstr "Consenti accesso alla pagina cronologia quando la password è attiva (ut
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -652,10 +664,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr ""
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr ""
@@ -981,7 +989,12 @@ msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
 msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
@@ -1230,6 +1243,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr ""
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr ""
@@ -1578,6 +1595,18 @@ msgstr "visualizzando <b>{start} - {end}</b> {record_name} su un totale di <b>{t
 msgid "records"
 msgstr "record"
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr "Maggiori informazioni"
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr "Aggiungi un nuovo monitoraggio modifiche pagina web"
@@ -1590,18 +1619,6 @@ msgstr "Monitora questo URL!"
 msgid "Edit first then Watch"
 msgstr "Modifica > Monitora"
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr "Maggiori informazioni"
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr "Pausa"
@@ -2115,6 +2132,10 @@ msgstr "Corrisponde a uno qualsiasi dei seguenti"
 msgid "Use page <title> in list"
 msgstr "Usa <title> pagina nell'elenco"
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr "Il corpo deve essere vuoto quando il metodo è impostato su GET"
@@ -2437,15 +2458,20 @@ msgstr "Modifiche testo/HTML, JSON e PDF"
 msgid "Detects all text changes where possible"
 msgstr "Rileva tutte le modifiche di testo possibili"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr "Errore nel recupero metadati per {}"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr "Protocollo non consentito o formato URL non valido"
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr "Corpo per tutte le notifiche — Puoi usare"
@@ -3036,3 +3062,12 @@ msgstr "Impostazioni principali"
 #~ msgid "Queue"
 #~ msgstr "In coda"
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr ""
+
+#~ msgid "Create a shareable link"
+#~ msgstr ""
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr ""
+

changedetectionio/translations/ko/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-02 11:40+0100\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: ko\n"
@@ -325,6 +325,14 @@ msgstr "설정:"
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -341,6 +349,10 @@ msgstr "비밀번호 활성화 시 변경 기록 페이지 액세스 허용 (dif
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr "모든 모니터의 기본 프록시 선택"
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -650,10 +662,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr "모든 모니터의 기본 프록시 선택"
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr "파이썬 버전:"
@@ -979,7 +987,12 @@ msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
 msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
@@ -1228,6 +1241,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr ""
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr ""
@@ -1576,6 +1593,18 @@ msgstr "총 <b>{total}</b>개 중 <b>{start} - {end}</b>개 {record_name} 표시
 msgid "records"
 msgstr "기록"
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr "추가 정보"
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr "새로운 웹 페이지 변경 감지 감시 추가"
@@ -1588,18 +1617,6 @@ msgstr "이 URL 모니터!"
 msgid "Edit first then Watch"
 msgstr "편집 후 모니터"
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr "공유 가능한 링크 만들기"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr "팁: '공유' 시계를 추가할 수도 있습니다."
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr "추가 정보"
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr "정지시키다"
@@ -2113,6 +2130,10 @@ msgstr "다음 중 하나와 일치"
 msgid "Use page <title> in list"
 msgstr "목록의 <제목> 페이지 사용"
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr "요청 방법이 GET으로 설정된 경우 본문이 비어 있어야 합니다."
@@ -2435,15 +2456,20 @@ msgstr "웹페이지 텍스트/HTML, JSON 및 PDF 변경"
 msgid "Detects all text changes where possible"
 msgstr "가능한 경우 모든 텍스트 변경 사항을 감지합니다."
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr ""
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr "모든 알림 본문 — 사용 가능:"
@@ -3157,3 +3183,12 @@ msgstr "기본 설정"
 #~ msgid "Cleared snapshot history for all watches"
 #~ msgstr "기록 지우기/재설정"
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr ""
+
+#~ msgid "Create a shareable link"
+#~ msgstr "공유 가능한 링크 만들기"
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr "팁: '공유' 시계를 추가할 수도 있습니다."
+

changedetectionio/translations/messages.pot

@@ -6,9 +6,9 @@
 #, fuzzy
 msgid ""
 msgstr ""
-"Project-Id-Version: changedetection.io 0.52.8\n"
+"Project-Id-Version: changedetection.io 0.52.9\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:29+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -324,6 +324,14 @@ msgstr ""
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -340,6 +348,10 @@ msgstr ""
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -649,10 +661,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr ""
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr ""
@@ -978,7 +986,12 @@ msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
 msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
@@ -1227,6 +1240,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr ""
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr ""
@@ -1575,6 +1592,18 @@ msgstr ""
 msgid "records"
 msgstr ""
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr ""
@@ -1587,18 +1616,6 @@ msgstr ""
 msgid "Edit first then Watch"
 msgstr ""
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr ""
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr ""
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr ""
@@ -2112,6 +2129,10 @@ msgstr ""
 msgid "Use page <title> in list"
 msgstr ""
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr ""
@@ -2434,15 +2455,20 @@ msgstr ""
 msgid "Detects all text changes where possible"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr ""
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr ""
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr ""

changedetectionio/translations/zh/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-18 21:31+0800\n"
 "Last-Translator: 吾爱分享 <admin@wuaishare.cn>\n"
 "Language: zh\n"
@@ -325,6 +325,14 @@ msgstr "设置为"
 msgid "to disable"
 msgstr "以禁用"
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr "为你的 changedetection.io 应用启用密码保护。"
@@ -341,6 +349,10 @@ msgstr "启用密码时允许访问监视器更改历史页面(便于共享差
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr "当请求无内容返回，或 HTML 不包含任何文本时，是否视为变更？"
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr "为所有监视器选择默认代理"
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr "用于通知链接中的"
@@ -650,10 +662,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr "带认证的 SOCKS5 代理仅支持“明文请求”抓取器，其他抓取器请改为白名单 IP"
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr "为所有监视器选择默认代理"
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr "Python 版本："
@@ -979,8 +987,13 @@ msgstr "已切换到模式 - {}。"
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
-msgstr "无法加载处理器/插件 '{}' 的编辑表单，插件是否缺失？"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
+msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 msgid "Updated watch - unpaused!"
@@ -1228,6 +1241,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr "当页面上找不到该过滤器时发送通知，便于知晓页面已变化且过滤器不再适用。"
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr "方式（默认），适用于无需 JavaScript 渲染的网站。"
@@ -1576,6 +1593,18 @@ msgstr "显示第 <b>{start} - {end}</b> 条{record_name}，共 <b>{total}</b>
 msgid "records"
 msgstr "记录"
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr "更多信息"
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr "新增网页变更监控"
@@ -1588,18 +1617,6 @@ msgstr "监控此 URL！"
 msgid "Edit first then Watch"
 msgstr "先编辑，再监控"
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr "创建可分享链接"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr "提示：你也可以添加“共享”的监控项。"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr "更多信息"
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr "暂停"
@@ -2113,6 +2130,10 @@ msgstr "匹配以下任意"
 msgid "Use page <title> in list"
 msgstr "列表中使用页面 <title>"
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr "当请求方法为 GET 时，请求正文必须为空"
@@ -2435,15 +2456,20 @@ msgstr "网页文本/HTML、JSON 和 PDF 变更"
 msgid "Detects all text changes where possible"
 msgstr "尽可能检测所有文本变更"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr "获取 {} 的元数据失败"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr "监控协议不允许或 URL 格式无效"
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr "所有通知的正文 — 您可以使用"
@@ -2986,3 +3012,12 @@ msgstr "否"
 msgid "Main settings"
 msgstr "主设置"
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr "无法加载处理器/插件 '{}' 的编辑表单，插件是否缺失？"
+
+#~ msgid "Create a shareable link"
+#~ msgstr "创建可分享链接"
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr "提示：你也可以添加“共享”的监控项。"
+

changedetectionio/translations/zh_Hant_TW/LC_MESSAGES/messages.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-22 06:19+0100\n"
+"POT-Creation-Date: 2026-02-05 17:47+0100\n"
 "PO-Revision-Date: 2026-01-15 12:00+0800\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: zh_Hant_TW\n"
@@ -325,6 +325,14 @@ msgstr "設置為"
 msgid "to disable"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html changedetectionio/blueprint/ui/templates/edit.html
+msgid "Limit collection of history snapshots for each watch to this number of history items."
+msgstr ""
+
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Set to empty to disable / no limit"
+msgstr ""
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Password protection for your changedetection.io application."
 msgstr ""
@@ -341,6 +349,10 @@ msgstr "啟用密碼時允許匿名存取監測歷史頁面"
 msgid "When a request returns no content, or the HTML does not contain any text, is this considered a change?"
 msgstr ""
 
+#: changedetectionio/blueprint/settings/templates/settings.html
+msgid "Choose a default proxy for all watches"
+msgstr "為所有監測任務選擇預設代理伺服器"
+
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Base URL used for the"
 msgstr ""
@@ -650,10 +662,6 @@ msgid ""
 "whitelist the IP access instead"
 msgstr ""
 
-#: changedetectionio/blueprint/settings/templates/settings.html
-msgid "Choose a default proxy for all watches"
-msgstr "為所有監測任務選擇預設代理伺服器"
-
 #: changedetectionio/blueprint/settings/templates/settings.html
 msgid "Python version:"
 msgstr "Python 版本："
@@ -979,8 +987,13 @@ msgstr "已切換至模式 - {}。"
 
 #: changedetectionio/blueprint/ui/edit.py
 #, python-brace-format
-msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
-msgstr "無法載入處理器 / 外掛 '{}' 的編輯表單，外掛是否遺失？"
+msgid "Could not load '{}' processor, processor plugin might be missing. Please select a different processor."
+msgstr ""
+
+#: changedetectionio/blueprint/ui/edit.py
+#, python-brace-format
+msgid "Could not load '{}' processor, processor plugin might be missing."
+msgstr ""
 
 #: changedetectionio/blueprint/ui/edit.py
 msgid "Updated watch - unpaused!"
@@ -1228,6 +1241,10 @@ msgid ""
 "your filter will not work anymore."
 msgstr "當頁面上找不到過濾器時發送通知，這有助於了解頁面何時變更導致您的過濾器失效。"
 
+#: changedetectionio/blueprint/ui/templates/edit.html
+msgid "Set to empty to use system settings default"
+msgstr ""
+
 #: changedetectionio/blueprint/ui/templates/edit.html
 msgid "method (default) where your watched site doesn't need Javascript to render."
 msgstr "方法（預設），適用於您監測的網站不需要 Javascript 渲染的情況。"
@@ -1576,6 +1593,18 @@ msgstr "顯示第 <b>{start} - {end}</b> 條{record_name}，共 <b>{total}</b>
 msgid "records"
 msgstr "記錄"
 
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "Changedetection.io can monitor more than just web-pages! See our plugins!"
+msgstr ""
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "More info"
+msgstr "更多資訊"
+
+#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
+msgid "You can also add 'shared' watches."
+msgstr ""
+
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Add a new web page change detection watch"
 msgstr "新增網頁變更檢測任務"
@@ -1588,18 +1617,6 @@ msgstr "監測此 URL！"
 msgid "Edit first then Watch"
 msgstr "先編輯後監測"
 
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Create a shareable link"
-msgstr "建立可分享連結"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "Tip: You can also add 'shared' watches."
-msgstr "提示：您也可以新增「共享」監測任務。"
-
-#: changedetectionio/blueprint/watchlist/templates/watch-overview.html
-msgid "More info"
-msgstr "更多資訊"
-
 #: changedetectionio/blueprint/watchlist/templates/watch-overview.html
 msgid "Pause"
 msgstr "暫停"
@@ -2113,6 +2130,10 @@ msgstr "符合以下任一條件"
 msgid "Use page <title> in list"
 msgstr "在列表中使用頁面 <title>"
 
+#: changedetectionio/forms.py
+msgid "Number of history items per watch to keep"
+msgstr ""
+
 #: changedetectionio/forms.py
 msgid "Body must be empty when Request Method is set to GET"
 msgstr "當請求方法設為 GET 時，內容必須為空"
@@ -2435,15 +2456,20 @@ msgstr "網頁文字 / HTML、JSON 和 PDF 變更"
 msgid "Detects all text changes where possible"
 msgstr "盡可能檢測所有文字變更"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 #, python-brace-format
 msgid "Error fetching metadata for {}"
 msgstr "讀取 {} 的中繼資料時發生錯誤"
 
-#: changedetectionio/store.py
+#: changedetectionio/store/__init__.py
 msgid "Watch protocol is not permitted or invalid URL format"
 msgstr "監測協定不被允許或 URL 格式無效"
 
+#: changedetectionio/store/__init__.py
+#, python-brace-format
+msgid "Watch limit reached ({}/{} watches). Cannot add more watches."
+msgstr ""
+
 #: changedetectionio/templates/_common_fields.html
 msgid "Body for all notifications — You can use"
 msgstr "所有通知的內文 — 您可以使用"
@@ -3115,3 +3141,12 @@ msgstr "主設定"
 #~ msgid "No watches available to recheck."
 #~ msgstr "沒有可複查的監測任務。"
 
+#~ msgid "Cannot load the edit form for processor/plugin '{}', plugin missing?"
+#~ msgstr "無法載入處理器 / 外掛 '{}' 的編輯表單，外掛是否遺失？"
+
+#~ msgid "Create a shareable link"
+#~ msgstr "建立可分享連結"
+
+#~ msgid "Tip: You can also add 'shared' watches."
+#~ msgstr "提示：您也可以新增「共享」監測任務。"
+

changedetectionio/worker.py

@@ -370,8 +370,7 @@ async def async_update_worker(worker_id, q, notification_q, app, datastore, exec
                 except Exception as e:
                     import traceback
                     logger.error(f"Worker {worker_id} exception processing watch UUID: {uuid}")
-                    logger.error(str(e))
-                    logger.error(traceback.format_exc())
+                    logger.exception(f"Worker {worker_id} full exception details:")
                     datastore.update_watch(uuid=uuid, update_obj={'last_error': "Exception: " + str(e)})
                     process_changedetection_results = False
 
@@ -435,8 +434,9 @@ async def async_update_worker(worker_id, q, notification_q, app, datastore, exec
                                     await send_content_changed_notification(uuid, notification_q, datastore)
 
                     except Exception as e:
+
                         logger.critical(f"Worker {worker_id} exception in process_changedetection_results")
-                        logger.critical(str(e))
+                        logger.exception(f"Worker {worker_id} full exception details:")
                         datastore.update_watch(uuid=uuid, update_obj={'last_error': str(e)})
 
                 # Always record attempt count
@@ -451,6 +451,7 @@ async def async_update_worker(worker_id, q, notification_q, app, datastore, exec
                                 logger.debug(f"UUID: {uuid} Page <title> is '{page_title}'")
                                 datastore.update_watch(uuid=uuid, update_obj={'page_title': page_title})
                         except Exception as e:
+                            logger.exception(f"Worker {worker_id} full exception details:")
                             logger.warning(f"UUID: {uuid} Exception when extracting <title> - {str(e)}")
 
                     # Record server header
@@ -485,12 +486,10 @@ async def async_update_worker(worker_id, q, notification_q, app, datastore, exec
                 gc.collect()
 
         except Exception as e:
-            import traceback
-            logger.error(traceback.format_exc())
 
             logger.error(f"Worker {worker_id} unexpected error processing {uuid}: {e}")
-            logger.error(f"Worker {worker_id} traceback:", exc_info=True)
-            
+            logger.exception(f"Worker {worker_id} full exception details:")
+
             # Also update the watch with error information
             if datastore and uuid in datastore.data['watching']:
                 datastore.update_watch(uuid=uuid, update_obj={'last_error': f"Worker error: {str(e)}"})
@@ -504,6 +503,8 @@ async def async_update_worker(worker_id, q, notification_q, app, datastore, exec
                         await update_handler.fetcher.quit(watch=watch)
                 except Exception as e:
                     logger.error(f"Exception while cleaning/quit after calling browser: {e}")
+                    logger.exception(f"Worker {worker_id} full exception details:")
+
                 try:
                     # Release UUID from processing (thread-safe)
                     worker_pool.release_uuid_from_processing(uuid, worker_id=worker_id)
@@ -532,6 +533,7 @@ async def async_update_worker(worker_id, q, notification_q, app, datastore, exec
                     logger.debug(f"Worker {worker_id} completed watch {uuid} in {time.time()-fetch_start_time:.2f}s")
                 except Exception as cleanup_error:
                     logger.error(f"Worker {worker_id} error during cleanup: {cleanup_error}")
+                    logger.exception(f"Worker {worker_id} full exception details:")
 
             del(uuid)