Ubuntu: Install FirefoxNewVersion/MozillaBuilds

Ubuntuzilla repository

An easy way of installing a Mozilla build is to use the Ubuntuzilla project repository. Ubuntuzilla is for ordinary users that want to use the latest Mozilla build as their default browser.

The Ubuntuzilla project's repository contains .deb repacks of the unmodified official Mozilla builds of Firefox, Thunderbird, and SeaMonkey. Just add the repository to your sources, and you'll be kept up to date on the latest Mozilla releases through the package manager. 

See the Ubuntuzilla website for details and usage instructions.

Installation

Old ubuntuzilla installer script users note: before installing these packages, run "ubuntuzilla.py -a remove -p packagename". Otherwise installation may fail due to the existence of a local diversion of /usr/bin/ links, placed there by the old ubuntuzilla script.

• It is strongly recommended to make a backup of your Firefox/Thunderbird/Seamonkey user profile, just in case. This is stored in your home directory. Firefox and Seamonkey profiles are stored in the .mozilla directory, Thunderbird profile is stored in .thunderbird or.mozilla-thunderbird directory.
• Add the ubuntuzilla repository to your /etc/apt/sources.list, either using your favorite editor, or by running the provided one-line command (copy and paste the entire line into a terminal, then press enter).

The repository to add, if you're adding it manually to your sources.list, is

deb http://downloads.sourceforge.net/project/ubuntuzilla/mozilla/apt all main

If you wish, verify that the repository has been added, by looking at /etc/apt/sources.list in your favorite text editor, or running "tail /etc/apt/sources.list" in the terminal.

• Then add the package signing key to your keyring, by running the following command:
  sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com C1289A29
• Update your package database:
  sudo apt-get update
• Install your desired package, with one of the following commands:
  sudo apt-get install firefox-mozilla-build
  sudo apt-get install thunderbird-mozilla-build
  sudo apt-get install seamonkey-mozilla-build

All of this can also be done through the GUI with the Synaptic Package Manager, if you so desire. See this step-by-step visual tutorialif you would like to try the GUI approach.

From here on, any updates will be offered to you through the usual channels in the Update Manager.

Localizations

The packages in the repos are 'en-US' (US English) versions. To install any other translations:

• Download the appropriate language pack add-on .xpi file,
• Install it from within Firefox/Thunderbird/Seamonkey (as you would with any other add-on).
• Enable it by setting the config general.useragent.locale to the name of the locale that you want to use. The name of the locale is the same as the name of the language pack that you installed.
  • To edit the config, go to Edit -> Preferences -> Advanced -> General -> Config Editor.
• Restart the application for the setting to take effect.

Firefox language packs are at

http://releases.mozilla.org/pub/mozilla.org/firefox/releases/<version>/linux-i686/xpi/

Thunderbird language packs are at

http://releases.mozilla.org/pub/mozilla.org/thunderbird/releases/<version>/linux-i686/xpi/

Seamonkey language packs are at

http://releases.mozilla.org/pub/mozilla.org/seamonkey/releases/<version>/langpack/

For more info about installing language packs, see this Mozilla knowledgebase article.

Removal

To uninstall the packages, uninstall the *-mozilla-build packages, using your favorite package manager. E.g., using apt-get:

sudo apt-get remove firefox-mozilla-build
sudo apt-get remove thunderbird-mozilla-build
sudo apt-get remove seamonkey-mozilla-build

If you no longer wish to have the Ubuntuzilla repository in your sources, you can edit it out of your /etc/apt/sources.list.

Reference:

https://support.mozilla.org/en-US/kb/install-firefox-linux
https://help.ubuntu.com/community/FirefoxNewVersion/MozillaBuilds
http://sourceforge.net/p/ubuntuzilla/wiki/Main_Page/