Hello Linux Geeksters. As you may know, Firefox 37.0.1 has been recently released, coming with important bug-fixes. Not long after that, Canonical has patched it and added it to the default repositories of all the supported Ubuntu systems.
To install Firefox 37.0.1 on 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
Optional, to remove firefox, do:
$ sudo apt-get remove firefox