Firefox updates it’s browser during certain periods of year so that it functions in a better way. But there are times when you don’t want to update Firefox browser either you like the old version or the new updated version may not work properly in your version of operating system.
So, you can prevent automatic update of Firefox browser
Click on “Tools” and then on “Options“.
Now select “Never check for update“.
Click on “OK“.
Remember that disabling Firefox browser may increase security risk for you.
Do you have any other idea to prevent automatic update of Firefox browser?