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F1 is a browser extension that allows you to share links in a fast and fun way. Share links from within the browser, from any webpage, using the same services you already know and love. F1 is made by Mozilla Messaging.
Mozilla F1 gives users an all-in-one area above the content they’re currently on. Once your accounts are connected, you simply click the tiny F1 icon in the toolbar to share the page you’re viewing with friends on Facebook , Twitter and Gmail. It’s that easy. Mozilla aims to make sharing content quick, easy and secure.
Get the addon here: F1 by Mozilla Labs (only Works with Firefox 3.6 and above)