There should be a clear statement about the status of Convergence on the web site. IIRC, the Firefox extension has been broken for more than a year now. Why? If Mozilla broke their APIs and made it impossible for the extension to work, then we should know about that. Otherwise, what's the excuse for the extension being broken for so long?
Convergence had the momentum, and there was a small but vocal group of people willing to support it. But, due to project mismanagement and lack of communication, that momentum has been lost.