Hi rebrec, There are a couple of ways to do this, the best example is how the enterprise firefox community implements Windows deployment. As well as adding registry keys for all users: [https://developer.mozilla.org/en-US/docs/Adding_Extensions_using_the_Windows_Registry] Previous Questions: *[https://support.mozilla.org/en-US/questions/753810] *Global Installation: [https://support.mozilla.org/en-US/questions/966922] *With and xpi [http://forums.mozillazine.org/viewtopic.php?f=38&t=629981] Third party alternatives: *[http://www.frontmotion.com/Firefox/] I have not done this before, but there are alot of references to xpi. If you have any questions about these I will do my best to help find more help.