Comment by Animats
If you submit a really detailed bug report, such as one where the problem was reproduced under a debugger, it becomes a "the reason you suck" speech. This really upsets some dev teams. The usual responses of the "turn it off and on again" and "reinstall" don't make the complaint go away.
There are two bugs in Firefox I'd like to report, but it's futile. One is that, launched on Ubuntu, Firestorm does disk I/O for about three minutes on launch. During that period it can't load complex pages, although it loads ones without Javascript fine. The other, again on Ubuntu, is that it freezes when large text boxes are being filled in. This only happens on some sites.
I feel like on windows there's similar issue - after crash (force close) Firefox will load UI fast, but spend several minutes to not show black screen instead of websites in my session
I remember finding 3 year old reddit post about this, and I have no idea whether the bug got into normal reporting place (where even is it?)