Indeed, can’t find relevant errors. I also had sporadic random Firefox weirdness, in the past month, for example sometimes when I have multiple tabs opened, after some random event not yet discovered, it is like Firefox is frozen, you can not switch tabs, but if you right click a tab, it instantly shows it, but the content does not refresh, but playing with the right click on tabs properly show the tab, this is weird, and so sporadic I didn’t bother, but this all can be linked, maybe the update of libx11-1.8.3-3 that is on Testing now, will fix that, I’m updating right now, will update thread later tonight after doing more tests with the download manager window.
//EDIT: so far, I can’t reproduce the thread’s issue, will see if my (related?) issue is fixed too. So far so goo on my side on Testing branch.