javascript_disabled decorator not working in functional-tests

[Jun Omae]

Investigating it, it is unable to disable JavaScript after starting the browser session with the latest version of Firefox. No workaround.

======================================================================
FAIL: runTest (trac.ticket.tests.functional.admin.TestAdminComponentNonRemoval.runTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\a\trac\trac\trac\tests\functional\better_twill.py", line 363, in wrapper
    prev_prefs = self.set_prefs({'javascript.enabled': False})
  File "D:\a\trac\trac\trac\tests\functional\better_twill.py", line 388, in set_prefs
    prev = driver.execute_script("""\
        var prefs = Components.classes
    ...<35 lines>...
        return prev;
    """, values)
  File "C:\Users\runneradmin\AppData\Local\venv\Lib\site-packages\selenium\webdriver\remote\webdriver.py", line 578, in execute_script
    return self.execute(command, {"script": script, "args": converted_args})["value"]
           ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\runneradmin\AppData\Local\venv\Lib\site-packages\selenium\webdriver\remote\webdriver.py", line 468, in execute
    self.error_handler.check_response(response)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "C:\Users\runneradmin\AppData\Local\venv\Lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 232, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: ExecuteScript and ExecuteAsyncScript are not supported for parent process browsing contexts: 60
Stacktrace:
RemoteError@chrome://remote/content/shared/RemoteError.sys.mjs:8:8
WebDriverError@chrome://remote/content/shared/webdriver/Errors.sys.mjs:169:5
UnsupportedOperationError@chrome://remote/content/shared/webdriver/Errors.sys.mjs:961:5
#execute@chrome://remote/content/marionette/driver.sys.mjs:3967:13

[Jun Omae]

Skip the tests with javascript_disabled decorator in [17927]. The tests will be removed or replaced later….