Sometimes, I'll click a new tab, and "something" happens. It's like it tries to create a new tab, yet it's just a half-formed nothing that you can't interact with. And when this happens, Firefox is destined to eventually crash / become unresponsive. I literally have to reboot to get Firefox working again. I haven't tried logging out. That would probably work, too. This also happens when moving new tabs, but I've only notice that happen on tabs with Youtube.com open. firefox -V Mozilla Firefox 100.0.2