Mozilla has no traditional profit motive. The Mozilla Corporation, which develops Firefox, is a 100% subsidiary of the Mozilla Foundation, which is legally a non-profit organisation.
So, if the Mozilla Corporation makes a profit, they cannot pay out that profit to shareholders. Practically all they can do with that money, is to pay higher wages or set it aside for future invest in their products.
That does not mean that they cannot stagnate or use money badly. And it does not either mean that they never need to make money. But it does mean that there’s no shareholders demanding short-term profit above all else.