Hello Linux Geeksters. As you may know, Firefox 36 has been released yesterday, coming with support for HTTP/2, the native support for HTML5 YouTube playback feature has been added but it is disabled by default, brings a feature to synchronize the pinned tiles from the new tab page and the 1024-bit RSA keys have been phased out.

Unfortunately, it does not come with GTK3+ Firefox UI support, but the Fedora developers are working at a GTK3+ version of Firefox.
In this article I will show you how to install Ubuntu 15.04 Vivid Vervet, Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr, Ubuntu 12.04 Precise Pangolin and derivative systems, like: Linux Mint 17.1 Rebecca, Linux Mint 17 Qiana, Linux Mint 13 Maya, Pinguy OS 14.04, Elementary OS 0.3 Freya, Deepin 2014, Peppermint Five, LXLE 14.04 and Linux Lite 2.
Because it has been added to Ubuntu’s default repositories, installing Firefox 36 on Ubuntu 15.04, Ubuntu 14.10, Ubuntu 14.04, Ubuntu 12.04 and derivative systems is easy. All you have to do is update the local repository index and install the firefox package. Like this:
$ sudo apt-get update
$ sudo apt-get install firefox