Earlier quoted context omitted.
They got more than $7B to build a browser. "I appreciate the constant existential wobble Firefox faces" I would also love to face $7B existential wobbles.
To put that number in perspective, drawing just 1% of that down each year and putting in a bank account earning interest would fund 100 engineers on $500k/year indefinitely.
With the same argument you could probably retire, after all you already earned (years you've been working) * (average salary).