I'd really love for Mozilla to focus on actually... you know... building a web browser. There are 1,000's of issues firefox needs to improve, from integrating native gnome-keyring support, to performance, to porting to rust, to... Let me PM or run Mozilla for a year. We won't buy any more companies, and we're going to focus on engineering.
Still no way to change UserAgent on Firefox Mobile.
I haven't tried to build Firefox for Android in a really long time but I wonder what the level of effort would be to just track the release tags with such a patch applied (i.e. the world's shallowest fork)