A week or so ago my gmail account(s) stopped working on thunderbird. Eventually I just deleted them from thunderbird. After some searching, I went to google, went to my account and got an account password to use for a mail client on my computer. I started a new email account in thunderbird for my gmail account. Thunderbird, latest version 91.10 After adding in name, email, password and clicking 'done' it opens up a non-menu'd browser of some kind to log into my gmail account. In that browser I add my email and hit submit...it then reloads to the same page asking me to log in. Thus, I can never log in to my google account in that browser, thus can never set up a gmail account in thunderbird, thus cannot use it at all. I have no clue what browser it is, but might be a firefox? No idea. I use firefox and have cookies on and such. However, not knowing what the thunderbird browser is, no menu bar to change any settings...and boom... I can no longer use thunderbird for gmail. I cannot even keep the information in thunderbird since it won't save it until I finish the log in to google..which is impossible. Don't want to go back to outlook, but This is unusable. Is there anyway to troubleshoot that log in browser it pulls up? I have disabled anti virus, ad blocking software, even took off security protocols that I could with firefox (thinking that might be the browser it uses)... spent a day on it.. there has to be a solution..or its off to outlook (ugh.)