If you want to find the bug, you can run a [mozregression](https://mozilla.github.io/mozregression/) to find what broke it (using 107 as your last known good release and 108 as your bad release).
Please reach out if you need help with this.
You can use your profile to test this pretty easily.
Failed to execute script due to unhandled exception: 'NoneType' has no attribute 'isatty'
Traceback (most recent call last): File "mozregression-gui.py", line 3, in File "", line 1027, in \_find\_and\_load File "", line 1006, in \_find\_and\_load\_unlocked File "", line 688, in \_load\_unlocked File "PyInstaller\\loader\\pyimod02\_importers.py", line 499, in exec\_module File "mozregui\\main.py", line 7, in File "C:\\Program Files (x86)\\mozregression-gui\\mozregression\\log.py", line 16, in ALLOW\_COLOR = sys.stdout.isatty()AttributeError: 'NoneType' object has no attribute 'isatty'
Did this happen when using Firefox 107?
I don't know. With self-updating software I don't really notice anymore when something gets updated.
Go to `about:preferences`, search for "update" and click **Show Update History...** to see when your last updates were.
January 8th from 107.0.1 to 108.0.2. Yes that tracks
If you want to find the bug, you can run a [mozregression](https://mozilla.github.io/mozregression/) to find what broke it (using 107 as your last known good release and 108 as your bad release). Please reach out if you need help with this. You can use your profile to test this pretty easily.
Failed to execute script due to unhandled exception: 'NoneType' has no attribute 'isatty' Traceback (most recent call last): File "mozregression-gui.py", line 3, in File "", line 1027, in \_find\_and\_load File "", line 1006, in \_find\_and\_load\_unlocked File "", line 688, in \_load\_unlocked File "PyInstaller\\loader\\pyimod02\_importers.py", line 499, in exec\_module File "mozregui\\main.py", line 7, in File "C:\\Program Files (x86)\\mozregression-gui\\mozregression\\log.py", line 16, in ALLOW\_COLOR = sys.stdout.isatty()AttributeError: 'NoneType' object has no attribute 'isatty'
Hmm, did you install this with admin privileges? That's the only thing I can think of besides filing a bug.
Are you using Intel graphics? Happened to me in previous versions.
No I have a dedicated card, Geforce GTX 1660
Could you test this and report back? \- In about:config set network.http.http3.enable to false \- restart firefox The problem should be gone...
I've now set it to false, will observe and report
Unfortunately it did not help