See more @ firefox notes.What's new:
Pinned tiles on the new tab page can be synced
Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.
Locale added: Uzbek (uz)
-remote option removed
No longer accept insecure RC4 ciphers whenever possible
Phasing out Certificates with 1024-bit RSA Keys
Shut down hangs will now show the crash reporter before exiting the program