Yesterday (19/08/2023) everything worked fine. Today (20/08/2023) I can no longer login to Twitch using Firefox. I restarted browser and cleared cache. No change.
EDIT: I tried again after 30min and it works again. I have some privacy-oriented plugins but I don’t play with custom useragent.
uBlock filters already covers everything privacy badger blocks. It’s better to have less extensions then more. More code that can cause security issues, which is why local learning was disabled in the first place.