Over the years I have changed this setting about 20 times and it keeps going back without asking me. Every time my mouse drops on the floor by accident it closes the window and all the apps running in the browser and Firefox insists! that the setting be off at all times. Is there a way to stop the browser from reverting this setting? I have been using and recommending firefox all my life i am changing this setting for the last time and if i have to do it again I am changing browsers and advising everyone i know to do the same.