I have multiple twitter accounts. When I updated to Firefox 26, the twitter account in the main window worked fine, but if I open my other twitter account in a multifox window, nothing works. Either I can't sign in at all, or if I can, then I can't tweet/retweet, etc. After a few frustrating days, I went back to Firefox 25, and everything worked fine immediately. I took a chance and updated to Firefox 27 yesterday, and the problem has returned. Any advice?
Did you fix it? If other extension is the culprit I can mark it as incompatible.