If you are not able to properly upgrade your Mozilla Firefox in Ubuntu then in this post I am going to show you simplest method to Update Mozilla Firefox in Ubuntu Using Terminal. We cannot update Firefox to a recent version in Ubuntu just by navigating to Help and by clicking the Check for Updates option as you can do on windows OS.
Follow below steps to update your Mozilla Firefox Browser in UBUNTU
Step-1: Open your terminal by pressing
Step-2: Add repository
sudo add-apt-repository ppa:mozillateam/firefox-next
Step-3: Update repository
sudo apt-get update
Note: Update process will take some time. Be patience.
Step-4: After successful update run following command in terminal to update your Mozilla Firefox Browser
sudo apt-get install firefox
When it prompts for Y or N, type Y and Wait for the process to complete and finally Restart your Mozilla Firefox Browser.
Great Job You have been successfully updated your Mozilla Firefox Browser in Your Ubuntu Machine.