It's not just bookmarks. It's history and the location bar. He mentions that one of the things which triggers his crashes is using the back button, which is a f

It's not just bookmarks. It's history and the location bar. He mentions that one of the things which triggers his crashes is using the back button, which is a feature that I think a reasonable number of people use. (I can't say that I've seen such issues myself... but it's been quite a while since I used Firefox under Linux.)