And iOS/Mac analogy isn’t holding here, because Firefox is a drop in replacement for Chrome. Not in a sense select either customization or convenience, but select both.

>what convenience are you talking about?

Largest extension support, built in integrations for stuff like casting, translation, image search, etc. It also just seems to have less quirks than Firefox. Not anything game breaking, but fiddling with video calls or tab groups or a half dozen more small features is a lot more intuitive on chrome than Firefox. Even if some of it is just outright incompetence (or malice), like abusing user agents.

It's no single thing, but they all add up.

>And iOS/Mac analogy isn’t holding here, because Firefox is a drop in replacement for Chrome.

In the superficial sense, sure. If you just need to go to 10 websites and need maybe 3 key extentions you'll be fine. Power users will see many subtle differences overtime. You can technically use both, but typically you will spend most time on a selected browser of choice.