Old version of mozilla firefox can run some of the great add ons which newer version is not supported. I am using both new and old version of mozilla firefox. So lets take a look
How To Stop Update For Mozilla Firefox?
First of all open your mozilla firefox browser Go to Tools > OptionsGo to Advanced settings Now if update will found click on “Ask me what I want to do”Click Apply>OK
You are done. To know more about mozilla firefox update policy read Release Note Page for the details about that update and the bugs which it will fix.