Socialbrowse, the Firefox plugin that lets you surf the Web in a link-sharing social manner, has just re-released its service with a couple of major new features. The Y Combinator-backed startup as been in private beta for some time, and will remain in private beta for a little while longer, but those users testing the service will be able to access and utilize its new features (get your invite below).

As part of Mozilla Corporation’s ongoing stability and security update process, Firefox 3.0.1 is now available for Windows, Mac, and Linux for free download from http://getfirefox.com/...