Mozilla launched "Mozilla Labs F1 service," an experiment designed to test the premise that sharing on the web should be easy, safe and fast. Saying, "Have you noticed how more and more pages on the web have 3, 6, or sometimes 12 little icons on a page encouraging you to share the link to that page with your friends? Why's that?"
Mozilla is launching F1 to make sharing through Firefox easy. In shot, Mozilla declared war on AddThis, Tweet Button and Facebook Like.
As you can see in video below, to use F1, "install the F1 add-on which adds a button to your Firefox toolbar. Specify which accounts you want to use for sharing, and from then on, sharing is as easy as clicking the toolbar button, picking how you want to share that link, adding a message and hitting Share."
More Info: Mozilla F1