Stopped working - FIXED Rated 4 out of 5 stars
2.0.21 stopped working a few days ago. Permanent connection error, unable to add/change city. Once options are reset, it's stuck to New York. Reinstalled. Now it doesn't even show on the browser bar.
Solved by deleting prefs.js and user.js from my Firefox profile!
Could you please file a bug so we can try to fix it?