Hello, in our organization we would like to push Firefox with GPO to users computers, but we have one problem. We have very stick security rules, so we need to block add-ins installation, and it's easy to do that using GPO. But we also using one approved add-in (Ghoster), so problem is that I can't "white-list" this add-in. If I configure this setting: Allow add-on installs from websites, and put this URL: https://addons.mozilla.org/en-US/firefox/addon/ghostery It will allow all addins installation from: addons.mozilla.org web page. Is it any way how I can block all add-ins just "white-list" only Ghoster, also users should be able to install it by them self. Firefox ESR + GPO