Debugging stuff like this is a real nightmare sometimes, but hey, maybe you’ll learn something cool in the process! One thing I’d try would be to make a new pr

Debugging stuff like this is a real nightmare sometimes, but hey, maybe you’ll learn something cool in the process! One thing I’d try would be to make a new profile - you can launch Firefox with the -P option to bring up the profile manager. I know it doesn’t work with either of your existing Stable or Nightly profiles, but maybe a clean profile will do the trick?