Hi All, I'm using Firefox on 24 PC's in a primary school computer Lab, I have had reports of students installing extensions and plugins that i wish to stop, also i've had issues with students not signing out of their email and other students gaining access. Im looking for solutions for the following and was hoping someone could point me in the right direction - 1. Disabling the installations of extensions and plugins. 2. Clearing browsing history/logging out of any accounts. 3. Locking settings so students can't change settings. Any help would be greatly appreciated. Adam