Steps to reproduce: 1. Ensure there's a bookmarks folder on Bookmarks toolbar 2. Click it in order to open it in tabs 3. Move around the tabs navigating away from the pages that were opened What happens: After certain amount of time, the browser crashes. I believe it has nothing to do with the page that last had the interaction, could be any of the bookmarks in the above-mentioned folder. Happens almost every time, easily reproducible.
Created attachment 52253 [details] Safari crash log
Created attachment 52254 [details] Safari crash log
Created attachment 52255 [details] Safari crash log
Created attachment 52256 [details] Safari crash log
Created attachment 52257 [details] Safari crash log
Duplicate of bug 36894?
I'm unable to reproduce it in r56969 so Alexey might be right above.
*** This bug has been marked as a duplicate of bug 36894 ***