Webkit was "new and unproven" once. It won out because it was easy to slot in, well-performing, and more modern than alternatives at the time. Most big projects

Webkit was "new and unproven" once. It won out because it was easy to slot in, well-performing, and more modern than alternatives at the time. Most big projects have slowly moved away from WebKit anyway, to its more modern derivatives Blink and Chromium. If Mozilla could produce an engine that is easier/as easy as to slot in, it's maybe faster or lighter in a few areas, and basically guarantees no exploits and crashes, there would be a massive market. Browser views power more and more appliances and applications, for which the current options are "the lesser evil" - cue the complaints about massive Electron apps. There is a big space for competition there, for someone whose main business is building browsers.