The Mozilla Corporation, which funds MDN, makes money primarily from royalties from search providers on Firefox (such as Google, Amazon, DuckDuckGo, and others).
Takebbanit Mozilla, i yettmuddun tadrimt i MDN, tettawi-d tadrimt-is seg yimseddayen n unadi deg Firefox (am Google, Amazon, DuckDuckGo, d wiyaḍ).