On the topic of user freedom, Firefox also doesn't allow installing extensions not signed by Mozilla unless you use a fork, Nightly, or Developer Edition (which is just a badly named beta)[0]. The hilarious thing is that Safari, the web browser from the company infamous for walled gardens and not letting you control your device, does let you install unsigned extensions on desktop[1].
[0]: https://wiki.mozilla.org/Add-ons/Extension_Signing
[1]: https://developer.apple.com/documentation/safariservices/saf...