"most browsers"? No. I can only think of Firefox. Certainly not Safari or Chrome. I don’t think Opera or IE do, either. And this is a Chrome extension. Edit

"most browsers"? No. I can only think of Firefox. Certainly not Safari or Chrome. I don’t think Opera or IE do, either. And this is a Chrome extension. Edit: Sure, though, add-on (which needs the hyphen) is far from the worst thing here :) Edit: Okay, Firefox & Opera. That’s a total of 21% market share. :-/