Firefox for iOS is a lie. It's a non-Firefox browser just set up to sync FF settings and bookmarks and kinda look like Firefox.
That's a bit harsh.
> It's a non-Firefox browser just set up to sync FF settings and bookmarks and kinda look like Firefox.
It's a WebView-wrapper like all other iOS "browsers" because that's everything Apple will allow. To be fair though, synced data, history, passwords and settings is probably one of the most important things for a mobile user, where entering things manually is a pain in the ass.
Basically NOT having this would risk losing users on the desktop (to something which does sync). And right now, Firefox can't afford to do that.
Which in turn would mean that lots of people would have to shell out several hundred dollars more for a Mac just to build it.
It's not exactly a stellar deployment-model when you try to push it at scale.
Separately from the ban on third-party browsing engines, iOS has technical restrictions preventing you from mapping unsigned code as executable, so JITs don't work. There may be some ways around that if you have a developer signature, but its messy at minimum.