Nice Rated 5 out of 5 stars
Been reluctant to try GM since forever. Finally got it on FF4, it's very cool with what you can do with it. I got it for GoogleReader to replace Better GReader that's not updated anymore (other than very belated version bumping), and now I am able to tweak the scripts I want easily. Plus found other cool ones too (like for Win Live mail and Youtube). Awesome addon!
Suggestion: Please add a toolbar button now that the status bar is the useless add-on bar and will remain hidden for most (and I don't want that Status-4-Evar or whatever it's called, because it is better with the extra window space now).