Regardless, I have Googled this for you: please return the favor by helping others learn to use search engines in the future before leaving comments insinuating that they are lying.
The tldr (as you'll probably insist on that also) is that Firefox finds Mozilla, not the other way around, as the latter is a non-profit while the former is a FOR-profit, so Mozilla actually can't directly fund Firefox.
https://www.reddit.com/r/firefox/comments/ow9k0y/is_there_a_...
https://www.reddit.com/r/firefox/comments/a98gmi/donations_t...