One thing I can say is that it is extremely rare that Firefox actually crashes on me. The instabilities are in the behaviors of the browser, its UI and the tabs/pages themselves. It can slow to a crawl, and even hourglass on me in an extreme case (I usually get fed up and just restart the browser and all the tabs at once to fix the issue before it gets that bad) but it manages to keep itself some, somehow.

That said, I'll poke around in there next time anyways and see if anything stands out. Thanks!