Check out about:crashes, you can submit a dump to the trace servers and get a backtrace that will tell you where it's crashing, and make it easy to file a bug r

Check out about:crashes, you can submit a dump to the trace servers and get a backtrace that will tell you where it's crashing, and make it easy to file a bug report. (if you're using a distro provided build, it might be more involved, see https://developer.mozilla.org/en-US/docs/Mozilla/How_to_get_a_stacktrace_for_a_bug_report https://developer.mozilla.org/en-US/docs/Mozilla/How_to_get_...)