Firefox 14 is out with new features specially focusing on security. Believe me this piece is a real sexy and the added panorama new tab view plus its lightness has overcomed earlier problems of loading slow and hanging much. You may like to check brand new features here .
We are here to guide you to install it in your linux machine quicky from the tar ball.
1. Get your tar ball
Go to this link and get your tar ball.
2. Extract it
I presume you downloaded the tar ball in your Downloads folder. Now time to extract it. You can right click on file and select “extract here”
or use this command to extract the file
tar xvjf firefox14.tar.bz2
In case you want to know what does those x v j and f do :-
x – extract
v – verbose output (lists all files as they are extracted)
j – deal with bzipped file
f – read from a file, rather than a tape device
3. Move your firefox folder to /opt/ directory
/opt is the directory where we generally use external applications. To know more about this read this article which will tell you where to install things on linux system.
sudo mv firefox /opt
4. Now remove or back up your old firefox
sudo mv /usr/bin/firefox /usr/bin/firefox-old
5. Create symbolic link to new firefox
sudo ln -s /opt/firefox/firefox /usr/bin/firefox
Now again if you have question that why /usr/bin then you should follow above given link to know about this.
Now this symbolic link trick should replace all your firefox links, global menu for firefox etc with new one.
Now close your browser if you are in firefox and open again. You should see new firefox 
.
To check version of firefox go to Help > About Firefox
