Hello Linux Geeksters. As you may know, after the release of Firefox 37, which brought a few interesting features (a new user rating system, the usage of HTTPS for Bing searches, better support for HTTP/2), two bug-fix releases have been made available by Canonical (Firefox 37.0.1 and Firefox 37.0.2).
Recently, Canonical has added Firefox 37.0.2 to the default repositories of all the supported Ubuntu systems (and their derivatives).
To install Firefox 37.0.2 on Ubuntu 15.04 Vivid Vervet, Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr, Ubuntu 12.04 Precise Pangolin, Linux Mint 17.1 Rebecca, Linux Mint 17 Qiana, Linux Mint 13 Maya, Pinguy OS 14.04, Elementary OS 0.3 Freya, Elementary OS 0.2 Luna, Deepin 2014, Peppermint Five, LXLE 14.04, Linux Lite 2 and other Ubuntu derivative systems, 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