If you want to doublecheck the policy has applied within firefox, open a new tab and go to about. You should see registry keys created under hklm software policies mozilla next, close and reopen firefox for the settings to take effect. I know its possible to force firefox to install addon from registry key, i did it, but it works juste once, why its a mystery here its the working key for my addon if i want this key to work, i need to launch cmd. Apache openoffice free alternative for office productivity tools. Firefox how to totally turn off the firefox autoupdater. It appears the autoupdate function is working, but the 2 bookmarks and the home page that are defined in the gpo are not effective. Hklm group policy restriction on software attent ion posted in virus, trojan, spyware, and malware removal help. Note also that for such configuration changes to take effect in firefox either the preference will have to be toggled off and on again or firefox will have to be restarted. Forums software and operating systems mozilla software firefox how to totally turn off the firefox auto. As of version 52, firefox will also search the registry locations hklm \ software \ policies \microsoft\systemcertificates\root\certificates. Gpo ineffective firefox esr firefox for enterprise. Any such cas will be imported and trusted by firefox, although they may not appear in firefoxs certificate manager.