The vast majority of these people complaining are using something like Brave or just plain Chrome.

They aren't expressing genuine criticisms for the most part.

Tons of them literally work at google.

Like, there's a poster a couple threads over insisting "Brave is great, you just have to ignore the crypto shit and change a bunch of settings" and like, somehow brave doesn't get regular 600 post long threads about how it's "Dead" and "It's the end" and "I have never used Firefox in my life but I certainly wont now!"

It's absurd.

"Mozilla's CEO makes $6 million" says people who get very angry if you suggest we should pay the managerial class less of the worlds money and also never seem to complain about any other CEO making that money and don't say anything about how much the CEO of Brave makes or how much money Google as a whole sucks out of reality to do whatever they want with, including subsidizing a browser to kill any competition.

Firefox got big because every young tech nerd installed it on everyone's machine and then a few years later, google literally paid tons of installers to also bundle and install Chrome and make it the default browser and everyone here always insists that people who did not choose to use firefox and did not even notice they now use chrome are somehow going to pay real money for firefox?

Meanwhile Opera is showing how nobody gives a shit about any of this "Privacy" nonsense in the market, and the important features are things like "you can install a theme your favorite youtuber made for shits and giggles" and "Advertising to children"

You want browser engine diversity? Guess what, that's Firefox right now. There is nothing else. That's why I use Firefox. There's nowhere else to go.