Rated 3 out of 5 stars
Can't get the icon/button out of the addons bar. If removed, it's there again after restarting. Uninstalled the addon. Maybe I didn't need it at all, because since I installed it, I never got any SOPA warning. Maybe I'm visiting the "wrong" sites. However, it's a good idea, so thanks.
Rated 4 out of 5 stars
Works. I don't know too much more I can say.This review is for a previous version of the add-on (Alpha.rev254.1-signed.1-signed).