– remove old firefox insallations.

yum remove firefox

– find correct archive file from https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/

eg. i am using https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/30.0b1/linux-x86_64/en-US/firefox-30.0b1.tar.bz2 for my 64 bit centos 

follow the commands

– first go to local folder

cd /usr/local

– wget the file 

wget https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/30.0b1/linux-x86_64/en-US/firefox-30.0b1.tar.bz2

– extract the file 

tar xvjf firefox-30.0b1.tar.bz2

-softlink firefox binary to system bin folder
ln -s /usr/local/firefox/firefox /usr/bin/firefox

That’s it!!

now use firefox command to invoke firefox from terminal