Definitely not humanity’s biggest problem. Chromium becoming the de facto browser creates a situation where one entity controls standards and influences how the web operates, impacting user choice and freedom, and reduces incentives for privacy and security updates.

This already happened once with IE.

I only use Firefox on desktop, but I doubt it will be a relevant choice much longer.

Edit: wrt telemetry, I was referring to the Android operating system. They collect anything and everything on users and all nearby devices.

I see it as a good thing. Apple is not without faults, but anything that keeps Google from harvesting more data is a win for humanity. The Safari browser is the only thing stopping Google’s browser monopoly. Unfortunately it is forced, and 99% of Apple users probably have no clue they are holding up the last line of defense.