Excluding Netflix as it's irrelevant technology-wise and including Microsoft, the difference is that those companies are offering a wide array of core products (operating systems, developer tools, server hosting, smartphones, etc) which most people on earth consume. They make a lot of money and continue to do so.
On the other hand what is Mozilla offering? A (now) obscure web browser that has run an Google charity for decades. It's painfully obvious that Mozilla isn't playing in the same category.
Mozilla makes and manages many other software titles besides Firefox.
Rust, NSS, etc. Just think about all the current software built on Rust. That alone is a huge contribution to the tech industry and to society, more indirectly.
If you're like, at a very senior level it's not unusual. But that also comes with a level of accountability to stakeholders that Baker demonstrably does not have.
How long do you imagine someone in such a position at a FAANG company would last if they were getting Baker's market share numbers?