It can be downloaded on Firefox.com and all existing users should be able to upgrade to it automatically. The Android version is trickling out slowly on Google Play. VP9 video decoding is an important step. For those who don’t know, VP9 is the successor to VP8, both of which fall under Google’s WebM project of freeing Web codecs from royalty constraints.
Mozilla is not touting the browser as a major release, but it does have specific changes worth noting for both Windows and OS X. As we have reported early Firefox has lost support for Metro while the latter has gained Notification Centre support for Web notifications.