Rated 3 out of 5 stars

This version doesn't work together with Weave. I really look forward to see that fixed, though :)

http://code.google.com/p/mozilla-keychain/issues/detail?id=2

This review is for a previous version of the add-on (1.0a7). 

Apparently this is now working with newer versions of Weave (see the referenced issue for details).