FireFox Sync

Firefox Sync, originally branded Mozilla Weave,^[2] is a browser synchronization feature that allows users to partially synchronize bookmarks, browsing history, preferences, passwords, filled forms, add-ons and the last 25 opened tabs across multiple computers.^[3]
It keeps user data on Mozilla servers, but the data is encrypted in such a way that no third party, not even Mozilla, can access user information.^[4]
Firefox Sync was originally an add-on^[5] for Mozilla Firefox 3.x and SeaMonkey 2.0, but it has been a built-in feature since Firefox 4.0^[6] and SeaMonkey 2.1.^[7]

Facebook Phone

Actually Facebook phone is not the new OS for smartphone. It is just the software which is use to  integrate Facebook communication with your existing smartphone just download it and install it.

Facebook founder, Mark Zuckerberg, introduce the new key feature called the Chat-Head, the round small onscreen button with your friend portrait on it, as the new home button.  Chat-head will follow you to every app you are using.  It will show up on screen when your friend try to contact you from Facebook. press on it  and start communication with your friend. Good idea, you don't need to switch to Facebook App anymore.

Facebook phone app can will first available for Android smartphone and may be available for iOS , if apple agree to let Facebook attached to their OS.

For android phone user, you can download this new Facebook app from Google Play in 2013 April,12th

Thanes