For those with the need for speed, browser speed that is....If you cannot wait weeks until the latest Firefox and Chromium browsers hit the Ubuntu repositories, you have to install them yourself manually. After some searching and frustration, I found out how to upgrade my linux Firefox browser to the latest v3.6.8 build, and finding the latest Chromium browser v6.0.477 build, below are the steps and commands. This should work as new builds are released. So this is a great tip to save and enjoy.
How to install Firefox v3.6.8 or newer - 4 Steps
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1) Add the latest Mozilla Firefox respository-
If you are using Ubuntu Jaunty (9.04) or later:
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
2) Add the public key-
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
3) Update your package database:
sudo apt-get update
4) Request to install the latest Mozilla product-
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
Source: http://sourceforge.net/apps/mediawiki/ubuntuzilla/index.php?title=Main_Page
How to install the latest Chromium browser- 3 Steps
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Run this command as ROOT:
1) Add the latest Chromium browser respository-
add-apt-repository ppa:chromium-daily/ppa
2) Update your package database-
sudo apt-get update
3) Request to install the latest Chromium browser-
apt-get install chromium-browser
