niobleoum Is this on a GTK-based desktop (basically everything but Plasma)? Personally I haven't noticed any issues with Firefox on Budgie, but I'll keep an eye on it.
@everyone: I'm going to delete some of your messages because this thread is starting to become unfocused. As I've said in the original post, I don't want off-topic discussion, "me too!", or similar messages. Just new problems and actual solutions. It becomes hard to track those when they're interspersed among dozens of other posts. So far I have let this slide somewhat, but it seems to just get worse and worse without intervention.