Trying to use Ao3, fanfiction.net, and my credit card account page, I am logged out and/or unable to log back in (I stay logged in because I access these pages quite a bit). The issue resolves itself, but this is happening several times a day, sometimes for up to 4 hours. For example, when I try to log into Ao3, once I tap "log in" I get an error message "your session expired". With fanfiction.net, I get the same error, and on my credit card account page, I get a pop-up error "your username or password is incorrect" despite having put in the correct information. In the now rare occurrence of my being able to log in, everything works as expected. I've tried accessing these websites on both Google Chrome and the Ecosia browser and have no problems, so obviously this is a Firefox problem. I love using Firefox and would like to keep using it, but if this issue is not resolved, I'll have to switch to another browser.