Chromium !== Chrome.

That is true, but the Chrome/Chromium ecosystem is largely driven by Google. And Google makes use of this power position to push through web standards that benefit them, but not the users. Therefore I choose to use Firefox, to support a more open browser ecosystem.

It’s literally a technological monoculture controlled by one company that can’t be trusted.

Ironically, focusing on the window chrome does not matter for a healthy web, let alone a healthy open standard.

How much do they really differ? Chromium browsers for the most part are just going to appear the same to site owners.

It'll all render the same using Chrome/Blink, but forks might take out tracking by Google (and potentially add other tracking), add adblock outside of plugins, or re-add support for Manifest V2 to name a few. Chromium forks can actually be pretty different.

Chromium is over 20 million lines of code. No Chromium fork is meaningfully different. Come back with that BS when Blink has 25% of its contributions coming from one of these Chrome skins.