Services or applications. An instance is just a server.

Bu yeah, there are a lot more than those! See here

As a browser? Firefox. The answer is always just Firefox. It’s not perfect by any means, but it’s the best in terms of privacy and ethics. It’s not shady like Brave is, it’s not Chromium-based like any other browser, and Mozilla is actively engaged in making the web a better place.

I’ve had the chance to discuss numerous times with people about other browsers, and I honestly don’t get why they always look elsewhere, when Firefox exists.

P.s.: sorry about the tirade, I obviously don’t have anything against you. It’s just that Firefox has existed for 21 years and it has been consistently user-focused and privacy-centric and I really don’t understand why people don’t just use it - maybe because it’s not as new and thus does not look as attractive as other browsers