In principle this is true. In the concrete case of Firefox, they have proven they focus more on side quests than on making a quality browser.

I lost any hope they'll go for technical excellence instead of virtue signaling and branding after the Brendan Eich disaster. They feel now like a Microsoft, Google, Apple, or any other big corp.

I used Firefox since it was called Firebird and finally gave up and switched to another (non big corp) browser and couldn't be happier.