Firefox needs to be faster then chrome, more customizable then vivaldi, simpler to use then all browsers, more inclusive about people identities; etc... then brave and be free for all like open source;
Browsers are not easy to make am definitely aware of that but the closer you get to assembly level speed and all the aforementioned; the more firefox will rocket forward.. rust is an awful language and honestly so is assembly but yah..
Just my opinion ❤️
