How to Install Firefox 19.0.2 On CentOS 6.3

By default installation of CentOS, Firefox (old version) was already installed for you.

1) Verify previous Firefox installed on CentOS:
    #  rpm -qa | grep -i firefox

2) Remove old version of Firefox if exist:
    #  rpm -e --nodeps firefox

3) Download new version of Firefox into /opt directory.
    Let say we already download file firefox-19.0.2.tar.bz2. Next:
    # tar jxvf firefox-19.0.2.tar.bz2

4) Above step will extract tar.bz2 file to a directory firefox.

5) Make a link to the firefox directory:
    # ln -s /opt/firefox/firefox /usr/bin/firefox