For me, Firefox 36.0.1 has not crashed but rather FireBug 2.08 starts acting unpredictably with respect to breakpoints.
If I am repeatedly editing JavaScript for a particular web page (web App), particularly if I am adding or removing lines, and have breakpoints set, they can get moved to other lines (and I don't think just a few up or down, based on what I have added or deleted). I can remove the breakpoint from the breakpoints tab, or clicking it on the source line number to remove the breakpoint, but Firebug will continue to stop there. Sometimes a reload of the web page will resolve the issue, but most of the time I have to do more to "reset" Firebug to correct functionality. It does not seem right to delete all breakpoints manually before I perform a web page reload, to then set them back up for debugging. Eventually, Firebug will put a throbber where the breakpoint red dot would go next to the page number in the source listing. It won't go away, even after waiting awhile. If I reload the page, the breakpoint is there. I can't say if this has just recently started happening with this Firefox/FireBug combination because this is the first time I have needed to use Firebug to debug Javascript since late November -- You received this message because you are subscribed to the Google Groups "Firebug" group. To unsubscribe from this group and stop receiving emails from it, send an email to firebug+unsubscr...@googlegroups.com. To post to this group, send email to firebug@googlegroups.com. Visit this group at http://groups.google.com/group/firebug. To view this discussion on the web visit https://groups.google.com/d/msgid/firebug/c72cc5fb-a6b3-45ff-a1e8-8828307ba575%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.