With recent releases, I've started noticing that Firefox UI freezes seemingly randomly. When it does, the UI doesn't respond to interactions, and there's no visible change in the UI, either - for example, if I switch to a different tab after the UI froze, there's no visual sign of switch happening. However, if I were to alt-tab to another window, then then UI looks as if it had responded behind the scenes. I.e., the tab switch were somehow kept pending until at the point of alt-tab. I've had this happened on two different machines, both running the latest version (106.0.1), but this was observed even with 105, I think. FWIW, I'm on Linux; I've tried both with and without hardware acceleration. Unfortunately, I don't have consistent/sure reproducer; not have I observed any particular pattern of interaction that'd lead to this. I was going to file a bug, but thought posting here before I do that.