Install Firefox 60 on Ubuntu

Download The Latest Version of Firefox 60 from their FTP using wget

For 32 bit systems

     wget https://ftp.mozilla.org/pub/firefox/releases/60.0/linux-i686/en-US/firefox-60.0.tar.bz2
 
For 64 bit systems
     wget https://ftp.mozilla.org/pub/firefox/releases/60.0/linux-x86_64/en-US/firefox-60.0.tar.bz2
  
Extract the tar package
    tar -xjf firefox-60.0.tar.bz2

 
Move the Firefox folder to opt
Remove the Older version of Firefox if it's there

sudo rm -rf /opt/firefox59
sudo mv firefox /opt/firefox60

Create the Symbolic link for new Firefox as default 
  
sudo mv /usr/bin/firefox /usr/bin/firefoxold 
sudo ln -s /opt/firefox60/firefox-bin /usr/bin/firefox