needs a little work to reach 5 stars Rated 4 out of 5 stars
This is a very good extension for Google +1 support. There are some features I'd like to see improved before I could give it a 5 star rating:
1. Instead of making a panel appear that contains the actual +1 button, make the icon in the address bar function as the button. (But beware, I've tried another extension that does this. It causes very annoying certificate error message dialog boxes to appear whenever I'm not authenticated to a network.)
2. Allow sharing to Google+ directly from the button, just like +1 buttons on web pages do.