diff --git a/qutebrowser/browser/webengine/webenginesettings.py b/qutebrowser/browser/webengine/webenginesettings.py
index 9f721fdcf..43ff61c09 100644
--- a/qutebrowser/browser/webengine/webenginesettings.py
+++ b/qutebrowser/browser/webengine/webenginesettings.py
@@ -417,6 +417,25 @@ def _init_profile(profile: QWebEngineProfile) -> None:
         lambda url: profile.clearVisitedLinks([url]))
 
     _global_settings.init_settings()
+    _maybe_disable_hangouts_extension(profile)
+
+
+def _maybe_disable_hangouts_extension(profile: QWebEngineProfile) -> None:
+    """Disable the Hangouts extension for Qt 6.10+."""
+    if not config.val.qt.workarounds.disable_hangouts_extension:
+        return
+
+    try:
+        ext_manager = profile.extensionManager()
+    except AttributeError:
+        return  # added in QtWebEngine 6.10
+
+    assert ext_manager is not None  # mypy
+    for info in ext_manager.extensions():
+        if info.id() == pakjoy.HANGOUTS_EXT_ID:
+            log.misc.debug(f"Disabling extension: {info.name()}")
+            # setExtensionEnabled(info, False) seems to segfault
+            ext_manager.unloadExtension(info)
 
 
 def _clear_webengine_permissions_json():
diff --git a/qutebrowser/misc/pakjoy.py b/qutebrowser/misc/pakjoy.py
index 87b84789b..d1db1b468 100644
--- a/qutebrowser/misc/pakjoy.py
+++ b/qutebrowser/misc/pakjoy.py
@@ -38,8 +38,11 @@ from qutebrowser.config import config
 from qutebrowser.misc import binparsing, objects
 from qutebrowser.qt import core
 from qutebrowser.utils import qtutils, standarddir, version, utils, log, message
+from qutebrowser.qt.webenginecore import QWebEngineProfile
 
-HANGOUTS_MARKER = b"// Extension ID: nkeimhogjdpnpccoofpliimaahmaaome"
+
+HANGOUTS_EXT_ID = "nkeimhogjdpnpccoofpliimaahmaaome"
+HANGOUTS_MARKER = f"// Extension ID: {HANGOUTS_EXT_ID}".encode("utf-8")
 HANGOUTS_IDS = [
     # Linux
     47222,  # QtWebEngine 6.9 Beta 3
@@ -228,7 +231,7 @@ def copy_webengine_resources() -> Optional[pathlib.Path]:
         )
         # https://github.com/qutebrowser/qutebrowser/issues/8257
         or config.val.qt.workarounds.disable_hangouts_extension
-    ):
+    ) or hasattr(QWebEngineProfile, "extensionManager"):  # Qt 6.10+
         # No patching needed
         return None
 
diff --git a/tests/unit/misc/test_pakjoy.py b/tests/unit/misc/test_pakjoy.py
index de037a3ea..50cfa3fd4 100644
--- a/tests/unit/misc/test_pakjoy.py
+++ b/tests/unit/misc/test_pakjoy.py
@@ -203,10 +203,10 @@ skip_if_incompatible = pytest.mark.skipif(
 
 
 @pytest.mark.usefixtures("affected_version")
+@skip_if_incompatible
 class TestWithRealResourcesFile:
     """Tests that use the real pak file form the Qt installation."""
 
-    @skip_if_incompatible
     def test_happy_path(self):
         # Go through the full patching processes with the real resources file from
         # the current installation. Make sure our replacement string is in it
@@ -266,7 +266,6 @@ class TestWithRealResourcesFile:
             "Not applying quirks. Expected location: "
         )
 
-    @skip_if_incompatible
     def test_hardcoded_ids(self):
         """Make sure we hardcoded the currently valid ID.
 
@@ -454,6 +453,7 @@ class TestWithConstructedResourcesFile:
     def quirk_dir_path(self, tmp_path: pathlib.Path) -> pathlib.Path:
         return tmp_path / "cache" / pakjoy.CACHE_DIR_NAME
 
+    @skip_if_incompatible
     def test_patching(self, resources_path: pathlib.Path, quirk_dir_path: pathlib.Path):
         """Go through the full patching processes with a fake resources file."""
         with pakjoy.patch_webengine():
@@ -473,6 +473,7 @@ class TestWithConstructedResourcesFile:
         with pakjoy.patch_webengine():
             assert pakjoy.RESOURCES_ENV_VAR in os.environ
 
+    @skip_if_incompatible
     def test_preset_env_var(
         self,
         resources_path: pathlib.Path,