I have Gmail Manager installed as addon on Firefox 3.6.x. Unfortunately it seems not working very well with the new Priority Inbox feature of GMail.
Now the counter display me only mails that arrive in the priority inbox and not the other.
Do you known any other extensions for Firefox that works well with this new Gmail feature. It would be nice have 2 numbers, one for the mails in the Priority Inbox and one for the other new emails.