The managemant behind firefox does not care about web browsers. They carre about their vision of social justice and the browser is just a tool to get funds for that.
For example, why is the address bar so tiny on high resolution screens? One would think this is an easy fix that would improve the UX for many people. Yet years go by with unresolved issues in the trackers.
Because in the year of our lord 2024, we for some reason still don't know how big a pixel is. Making a textbox 1cm tall should be trivial, but is for some reason either impossible or never done.