Comment 9 for bug 871472

Hey Marco, Michael,

This sounds a lot like https://bugs.launchpad.net/thunderbird-eds-extension/+bug/863150, which got fixed in 0.3.7a. That should (hopefully!) be released shortly. This will let you cancel out of those authentication prompts, and it won't bother you again for the rest of your session

In the meantime, yes, disabling the add-on via safe-mode is a good workaround.

Thanks,

-Mike