In its 2020 financial results, the most recent available, Mozilla
listed its total revenue as $496 million, with royalties from search
deals equaling $441 million
The issue is that Mozilla, inc. is not happy with being a browser vendor and wants to go "beyond the browser" (as their management puts it.) Therefore, they use the browser revenue as a piggy bank for other projects like a rebranded VPN service, a bookmark storing service (Pocket), etc. and let the browser wither on the vine.In my opinion, if Firefox was owned by a company that liked and wanted to focus on Firefox, it would not be in a death spiral right now. But instead it's owned by a company that wants to use the browser as a cash cow while its market share collapses. And when it finally dies they'll just point at Chrome and say "there's nothing we could have done, Google is too big." Never mind the fact that Firefox beath IE which was also funded by a megacorporation.