Firefox is intended to be customisable. If you are intending to deploy Firefox within your own organisation you may wish to lock down some features and changes if so see *MDN: Deploying Firefox in an enterprise environment Configuration https://developer.mozilla.org/Firefox/Enterprise_deployment#Configuration * CCK2 https://mike.kaply.com/cck2/ <br> Note the tool remains free, there are support articles on the site but full support has to be paid for. If you are distributing or modifying and possibly selling Firefox based browsers there are rules, basically you may not be permitted to use the Firefox name or Firefox logos https://www.mozilla.org/foundation/trademarks/faq/ <blockquote>Can I distribute any of the Mozilla software from my website, by CD, or to my friends, employees or students? <br> If you are redistributing '''unchanged official stable binaries downloaded from mozilla.org''', to anyone in any way and for any purpose, no further permissions are required from us. We request that you distribute the latest stable version (and of course, we believe that it's in your best interest to do so as well). The notification requirements of the MPL have been met for our binaries, so although it's a good idea, you are not required to ship source code. If you want to distribute one of our products and this answer does not apply to you, please say so explicitly in your trademark use request, because otherwise you'll just get pointed at this FAQ entry :-) <br><br> Can I download one copy and install it on lots of machines in my company/school/university/pizzeria? Sure. Our products are Free software, both as in speech and as in beer, and there are no fees or notification requirements. If you plan to reconfigure it and then sell the machines, we do have a policy about that. https://www.mozilla.org/foundation/trademarks/distribution-policy/

What setting(s) do you want to lock? See also Configuration: *https://developer.mozilla.org/en-US/Firefox/Enterprise_deployment