Qt 6.9: Work around QtWebEngine not handling <permission> element

See #8539

doc/changelog.asciidoc

@@ -49,6 +49,9 @@ Fixed
   number, which fixes overzealous blocking on ScienceDirect.
 - New site-specific quirk to fix existing accounts showing as non-existent on
   Digitec/Galaxus.
+- Workaround for microphone/camera permissions not being requested with
+  QtWebEngine 6.9.0 on Google Meet, Zoom, or other pages using the new
+  `<permission>` element.
 - Resolved issues in userscripts:
     * `qute-bitwarden` will now prompt a re-login if its cached session has
       been invalidated since last used. (#8456)

qutebrowser/config/qtargs.py

@@ -159,6 +159,11 @@ def _qtwebengine_features(
         # TODO adjust if fixed in Qt 6.8.2/.3 or 6.9.0/.1
         disabled_features.append('DocumentPictureInPictureAPI')
 
+    if versions.webengine == utils.VersionNumber(6, 9):
+        # WORKAROUND for https://bugreports.qt.io/browse/QTBUG-135787
+        # TODO adjust if still present in 6.9.1
+        disabled_features.append('PermissionElement')
+
     if not config.val.input.media_keys:
         disabled_features.append('HardwareMediaKeyHandling')
 

tests/unit/config/test_qtargs.py

@@ -448,25 +448,25 @@ class TestWebEngineArgs:
         expected = ['--disable-features=InstalledApp'] if has_workaround else []
         assert disable_features_args == expected
 
-    @pytest.mark.parametrize('qt_version, has_workaround', [
+    @pytest.mark.parametrize('qt_version, disabled', [
         # Qt 6.6
-        ('6.6.3', False),
+        ('6.6.3', None),
         # Qt 6.7
-        ('6.7.0', True),
-        ('6.7.1', True),
-        ('6.7.2', True),
-        ('6.7.3', True),
+        ('6.7.0', "DocumentPictureInPictureAPI"),
+        ('6.7.1', "DocumentPictureInPictureAPI"),
+        ('6.7.2', "DocumentPictureInPictureAPI"),
+        ('6.7.3', "DocumentPictureInPictureAPI"),
         # Qt 6.8
-        ('6.8.0', True),
-        ('6.8.1', True),
-        ('6.8.2', True),  # tbd
-        ('6.8.3', True),  # tbd
+        ('6.8.0', "DocumentPictureInPictureAPI"),
+        ('6.8.1', "DocumentPictureInPictureAPI"),
+        ('6.8.2', "DocumentPictureInPictureAPI"),
+        ('6.8.3', "DocumentPictureInPictureAPI"),
         # Qt 6.9
-        ('6.9.0', True),  # tbd
-        ('6.9.1', True),  # tbd
+        ('6.9.0', "DocumentPictureInPictureAPI,PermissionElement"),
+        ('6.9.1', "DocumentPictureInPictureAPI"),  # tbd
     ])
-    def test_document_pip_workaround(
-        self, parser, version_patcher, qt_version, has_workaround
+    def test_disble_feature_workaround(
+        self, parser, version_patcher, qt_version, disabled
     ):
         version_patcher(qt_version)
 
@@ -477,8 +477,7 @@ class TestWebEngineArgs:
             if arg.startswith(qtargs._DISABLE_FEATURES)
         ]
 
-        flag = "--disable-features=DocumentPictureInPictureAPI"
-        expected = [flag] if has_workaround else []
+        expected = [f"--disable-features={disabled}"] if disabled else []
         assert disable_features_args == expected
 
     @pytest.mark.parametrize('enabled', [True, False])