Mozilla has also added a new Forget feature to Firefox. Forget gives you an easy way to tell Firefox to clear out some of your recent activity. Instead of asking a lot of technical questions (delete cookies, history etc), Forget asks you only one: how much do you want to forget? Once you tell Firefox you want to forget the last 5 minutes, or 2 hours, or 24 hours, it takes care of the rest.
Mozilla's also announced a new privacy-focused program called Polaris, pulling its privacy efforts together with those of other groups focused on making real gains for online privacy and control. Mozilla has also a new Firefox Developer Edition customized for Web developers with some new tools available.