Sadly I don't remember anymore. I ran into plenty of them 3 or 4 years ago (every week or so), then I stopped using Firefox altogether because of that. At work, some coworkers were using Firefox last year and it broke various third party libraries (especially graphics heavy ones). Rather than trying to fix the bugs, we just decided to deprecate Firefox support altogether because its usage was down to like 2 or 3 percent. Those resources were better spent on, say, improving mobile usability and performance for everyone.
Edit: I wish Mozilla would just fork Chromium and add/delete whatever privacy things they want, like Brave. There's no reason to maintain Gecko anymore.
Edit: I wish Mozilla would just fork Chromium and add/delete whatever privacy things they want, like Brave. There's no reason to maintain Gecko anymore.