Sorry for getting out of topic somewhat, But how many users would benefit if Mozilla gives many more ways to install extensions from unfederated source? That sounds like browser malware disaster from 2010s to me
Even Chrome has a flag you can flip and install an unpacked extension from file. Sending this stuff up to Mozilla for them to grace or relegating developers and corporate users to some unbranded or esoteric dev binary is offensive to the end user IMO. I mean, it's not even federation, just centralization. Sure you can host it on your webpage, but it needs to be signed by the mother ship either way.
Firefox removed "about:config" from Firefox on android as well. Maybe we'll get a cli flag escape hatch for a year when they do the same on desktop. Not trusting the end user in the name of security is not a Google-only play despite all the Moz Marketing.
These days I don't use Firefox because I want to, but because it's the least worse choice.
I'm confident their hostile behavior towards user control is one of the reasons why they're hemorrhaging users. And no, giving users way to change UI colors not control. It's a fucking pacifier and an insult.