There are no “MAL connections”, there is only a one-time account import. This is an independent tracker.

Your issue seems to be that the cookies from your normal tabs don’t apply to the extension. You say you are logged in via normal browser windows but not logged in via the extension. That is indeed very weird and I can’t reproduce your problem locally. When I log out, I’m logged out in both. When I log in, I’m logged in in both.

You can try to disable bad ad blockers like Adblock Plus and try uBlock Origin instead.

Another problem that might be occuring is that your cache is very outdated. Try clearing your cache to make sure the extension is not accessing any old data.

I would also try reproducing the same problem in Chrome. See if it works in Chrome for you or not.