Because Mozilla really doesn’t care about what people think anymore. They’re an incredibly bureaucratic group dealing with a lot of red tape placed as a force for good that doesn’t always meet the mark. It’s mainly the reason Firefox doesn’t have a lot of things (that it honestly should have)

Also, Firefox is a completely original browser but it doesn’t have a “chromium” version the browser like Google Chrome does. Both of the Firefox commercial product and the source code compile to the same thing.