Small fix for 3.14 setup

.github/workflows/test-only.yml

@@ -52,4 +52,13 @@ jobs:
     uses: ./.github/workflows/test-stack-reusable-workflow.yml
     with:
       python-version: '3.13'
-      skip-pypuppeteer: true
+      skip-pypuppeteer: true
+
+
+  test-application-3-14:
+    #if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    needs: lint-code
+    uses: ./.github/workflows/test-stack-reusable-workflow.yml
+    with:
+      python-version: '3.14'
+      skip-pypuppeteer: false

changedetectionio/content_fetchers/webdriver_selenium.py

@@ -157,17 +157,7 @@ class fetcher(Fetcher):
                     import io
                     img = Image.open(io.BytesIO(screenshot_png))
                     # Convert to RGB if needed (JPEG doesn't support transparency)
-                    # Always convert non-RGB modes to RGB to ensure JPEG compatibility
-                    if img.mode in ('RGBA', 'LA', 'P', 'PA'):
-                        # Handle transparency by compositing onto white background
-                        if img.mode == 'P':
-                            img = img.convert('RGBA')
-                        background = Image.new('RGB', img.size, (255, 255, 255))
-                        if img.mode in ('RGBA', 'LA', 'PA'):
-                            background.paste(img, mask=img.split()[-1])  # Use alpha channel as mask
-                        img = background
-                    elif img.mode != 'RGB':
-                        # For other modes, direct conversion
+                    if img.mode != 'RGB':
                         img = img.convert('RGB')
                     jpeg_buffer = io.BytesIO()
                     img.save(jpeg_buffer, format='JPEG', quality=int(os.getenv("SCREENSHOT_QUALITY", 72)))

changedetectionio/tests/conftest.py

@@ -2,6 +2,7 @@
 import psutil
 import time
 from threading import Thread
+import multiprocessing
 
 import pytest
 import arrow
@@ -97,6 +98,34 @@ def cleanup(datastore_path):
             if os.path.isfile(f):
                 os.unlink(f)
 
+def pytest_configure(config):
+    """Configure pytest environment before tests run.
+
+    CRITICAL: Set multiprocessing start method to 'fork' for Python 3.14+ compatibility.
+
+    Python 3.14 changed the default start method from 'fork' to 'forkserver' on Linux.
+    The forkserver method requires all objects to be picklable, but pytest-flask's
+    LiveServer uses nested functions that can't be pickled.
+
+    Setting 'fork' explicitly:
+    - Maintains compatibility with Python 3.10-3.13 (where 'fork' was already default)
+    - Fixes Python 3.14 pickling errors
+    - Only affects Unix-like systems (Windows uses 'spawn' regardless)
+
+    See: https://github.com/python/cpython/issues/126831
+    See: https://docs.python.org/3/whatsnew/3.14.html
+    """
+    # Only set if not already set (respects existing configuration)
+    if multiprocessing.get_start_method(allow_none=True) is None:
+        try:
+            # 'fork' is available on Unix-like systems (Linux, macOS)
+            # On Windows, this will have no effect as 'spawn' is the only option
+            multiprocessing.set_start_method('fork', force=False)
+            logger.debug("Set multiprocessing start method to 'fork' for Python 3.14+ compatibility")
+        except (ValueError, RuntimeError):
+            # Already set, not available on this platform, or context already created
+            pass
+
 def pytest_addoption(parser):
     """Add custom command-line options for pytest.
 

changedetectionio/translations/de/LC_MESSAGES/messages.po

@@ -2229,7 +2229,7 @@ msgstr "Über dem Preis, um eine Benachrichtigung auszulösen"
 #: changedetectionio/processors/restock_diff/forms.py:25
 #, python-format
 msgid "Threshold in %% for price changes since the original price"
-msgstr "Schwellenwert in %% für Preisänderungen seit dem ursprünglichen Preis"
+msgstr "Schwellenwert in % für Preisänderungen seit dem ursprünglichen Preis"
 
 #: changedetectionio/processors/restock_diff/forms.py:28
 msgid "Should be between 0 and 100"