Is Firefox Based On Chromium?

No, Firefox is one of just a few browser that is not based on Chromium. Firefox is based on Quantum Browser Engine instead of Chromium.

How Does Firefox Make Money?

Google pays Firefox $500M+ per year to have Firefox be their default search engine. Some argue that Google is paying Firefox this much solely to make people think that Chrome and Chromium-based browsers are not a monopoly. If Firefox, Safari, and other browsers no longer existed, 99% of browsers would be based on Chromium and essentially controlled by Google.