Shareaholic’s functionality is fairly straightforward. You find a site you like, click on the plugin’s button nestled in your browser toolbar, and choose which service you’d like to share it to (there’s dozens of options, including sites like Facebook, Digg, and delicious). This functionality isn’t especially unique — there are plenty of other apps that make it easy to share interesting websites and media with friends. But Shareaholic does have the advantage of being compatible with every major browser, including support for IE, Firefox, Chrome, Opera, and Safari. And perhaps more important is the startup’s success at grabbing attention of the browser makers themselves: Shareaholic is a featured Firefox extension (it’s shown on the browser’s ‘Get Started’ page) and Microsoft has previously distributed it preinstalled with some copies if Internet Explorer 8.