Install Firefox 15 in Ubuntu 12.04/11.10/11.04/10.10/Linux mint

Install Firefox 15 in Ubuntu 12.10/Ubuntu 12.04 Precise/Ubuntu 11.10 Oneiric/11.04 Natty/10.04 Lucid/Linux Mint 13/12/11/9 (New Release)

Mozilla Firefox is a free and open source web browser developed for Microsoft Windows, Mac OS X, and Linux coordinated by Mozilla Corporation and Mozilla Foundation. Firefox uses the Gecko layout engine to render web pages, which implements current and anticipated web standards. As of May 2012, Firefox has approximately 25% of worldwide usage share of web browsers, making it the third most widely used web browser.

What's new in this Release:

• Silent, background updates
• Support for SPDY networking protocol v3
• WebGL enhancements, including compressed textures for better performance
• Localization in Maithili
• Optimized memory usage for add-ons
• Native support for the Opus audio codec added
• The audio and video elements now support the played attribute
• The source element now supports the media attribute
• Focus rings keep growing when repeatedly tabbing through elements

Note: You Don't need add ppa in Ubuntu/Linux mint, because Ubuntu repositories already have latest firefox version. Just enter 2nd and 3rd command.

To install Firefox 15 on Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

Terminal Commands:
sudo add-apt-repository ppa:ubuntu-mozilla-security/ppa
sudo apt-get update
sudo apt-get install firefox

Here you can find firefox in other languages.
That's it, Enjoy