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.