Dear Thunderbird Support, I installed Thunderbird and added my xfinity email account. All worked fine for half a day, then it stopped connecting while downloading a folder of files and hasn't reconnected since. The "extra" pop up window where the first time I logged into Xfinity and then used the Xfinity App for 2FA and it worked fine, now opens a window and starts with a long URL, then after approx 10 sec replaces that long url with a localhost one and the page says "Unable to connect, An error occurred during a connection to localhost." Can't seem to get past this now. Restarted the program then restarted my Windows 10 PC, same unfortunate result. I'm afraid to remove the account because it wasn't through synchronizing one or more folders. Thanks, Robert