How to install firefox 4 beta in ubuntu

Firefox-4.0 is here with the beta versions & some brand new cool features. Try it in your favorite ubuntu.

Follow the given steps to install firefox-4.0.

1. Go to System->Administration->Software sources
2. Open 'other software' tab.
3. Add the following line
http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu

4. Close it.
5. A box will appear,asking you to reload the sources. select 'reload'.
6. Open the terminal. run 'sudo apt-get install firefox-4.0'.
7. Go to Applications->Internet->Mozilla developer preview web browser

This will give you the absolutely latest version of the firefox & it might be beta. Right now it's showing 4.0b3 version.

Another way to do this is:

1. Go to http://www.mozilla.com/en-US/firefox/beta/
2. Download the firefox.
3. Extract it to the home folder.
4. Open terminal. then execute the following in the provided order.

cd ~
~/firefox/firefox

This is showing 4.0b2 right now.
Happy browsing!!