A port of a browser is relatively minimal effort. Typically, the changes are largely cosmetic, and occasionally skin deep.

There's a reason none of the ports of Chrome caught the recent snafu with Google having its own special addon that fucks your privacy.

Developing a browser, Firefox or Chrome, takes a huge amount of effort, and are on a similar scale to both Windows and Linux. It's a lot. There are a lot of places to hide things. Taking all of that, and making V2 continue to work... well it'll be alright to start with. It's probably a flag somewhere currently. But in 2 years time? 5 years time? It will take a lot to keep V2 working, let alone back porting V3 features that people may actually want.

Just use Firefox instead.