That is likely to be non-trivial to develop unless you’re very comfortable with large, complex C++ projects and then you have to convince them to accept and ship ship it. That’s better than not having the option but it’s not for the faint of heart.
Chromium — yeah, seems like not friendly towards outside contributors, and nobody has convinced Google to accept stuff they don't care about (JIT for unpopular CPUs, support for new windowing systems, video decoding acceleration APIs, …).
Mozilla? Getting your patches merged is rather easy and very pleasant. Firefox is truly a community project we all build together.
Sure, but this is a thread about how Linux is better than MacOS because you can modify Linux. Those same criticisms you have I think could apply to Linux too.
True. In my experience though, it tends to work out. If 100 people are affected by a bug it's a drop in the ocean in the grand scheme of things, but now you only need a 1 in 100 chance of someone being up to the task! And the others can help with info and testing along the way.
Sure, but this is a thread about how Linux is better than MacOS because you can modify Linux. I think a Linux patch would take much longer to reach users. Modern browsers auto update frequently, but I don't think Linux users update Linux as frequently.