Mozilla's Social API allows participating social-networking sites to create persistent sidebar access to their sites. But Firefox 17 also drops support for older Macs.
Facebook has accepted a friend request from Firefox and Mozilla's new Social API today, as the browser updates with several security and feature updates after yesterday's Firefox for Android update.
The biggest feature debut in Firefox 17 (download for Windows | Mac | Linux) is the Social API, launching with Facebook Messenger, which allows participating social-networking sites to create persistent sidebar access to their site. Although most new browser technologies depend on entirely on how many developers integrate it, the Social API likely will be different.
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Like? New Firefox adds Facebook integration | The Download Blog - CNET Download.com