If this has been asked previously, my sincerest apologies. I couldn't find the answer. I have been an user of Thunderbird for personal and work email clients for roughly 2+ decades now. But I am stumped with recent behavior coming from thunderbird (mozilla email) for my private, professional email account. And I'm not a techie. I usually allow both Mozilla Firefox and Thunderbird update automatically. And typically, there has been no issues other than to update/remove an add-in. However, starting at around the end of July or beg of August, I have been seeing the following behavior: At certain points of the day including at startup, I get a set of pop-up windows from Thunderbird asking for access to my google account. I don't understand why thunderbird would want me to provide my google credentials when the email account that I'm using thunderbird for is neither an exchange (outlook.com or live.com) or my gmail.com account. It's my professional email address that is hosted by a third party. And when I click the deny button on both windows, it still pops up at some point during the day. It was annoying as 'heck' when I was with a client as it kept popping up. Don't know what I've done but I would like to know how to stop this popup window activity! I'll also add that if I close down thunderbird and then restart, the windows pop up almost instantly. So, any help would be welcome! I've attached screenshots of both windows with my email addresses highlighted out so anyone can see what I'm dealing with.