Rated 4 out of 5 stars

le Wulf ar Meith. 19, 2008 · buan-nasc

This extension is great, and works fine with Firefox 3. I’d give it 5 stars if it supported multiple-account checking.

BTW: An “invalid username/password combination” error when you know your password is correct is likely caused by blocking third party cookies without setting an exception for yahoo.com (as mentioned in the FAQ). This should probably be mentioned in the error message itself. (Or, better yet, would it be possible to have the extension set the cookie exception itself?)