I have a lot of tabs open, and I don't know which are responsible for the popups. Previously, I'd get 2-3 unexpected popups per day (that were not triggered by navigation in visible tabs), but since yesterday, every ~10min I'm getting 2 popups right after each other. How do I find out what tab is triggering them? Besides the annoyance, I find it worrying that firefox apparently "intends" to input login details into background tabs - if I had entered my master password previously, I wouldn't even notice that the password store had been accessed. It would be really nice if the master password popup had a button to view the triggering tab (and perhaps highlight the fields that would have been filled after unlocking), but until that happens, I really need some way to locate the problematic tab(s)... edit: changing the "fill usernames and passwords automatically" as well as "ask to save passwords" settings did not prevent the frequent popups from occurring. Even worse, while such a popup is open, firefox seems to be unable to load new pages in any tabs, and interactive applications (eg. google sheets) lose their connection until I close the popup...