1Passwd - Web Form Filler and Password Manager for Mac OS X I guess it was inevitable that someone would do this... Here's a Firefox extension that lets Firefox use the Mac OS X Keychain, as well as mimic Safari's excellent form-filling smarts. The only question I have, frankly, is Why would I pay $30 for this when Safari does it for free? It's not as if Firefox were a better browser than Safari. Now, if someone does it for Opera, it might be a different story!