$75 million per year from subscriptions and ads, according to their latest report (2022 for some reason). Another commenter did some quick math to try to prove

$75 million per year from subscriptions and ads, according to their latest report (2022 for some reason). Another commenter did some quick math to try to prove that donations were fruitless and found that Firefox could reasonably expect to replace that revenue with a donation box: https://news.ycombinator.com/item?id=40901664 https://news.ycombinator.com/item?id=40901664 So in other words: the side projects aren't successful enough to justify not accepting donations.