You wanna guess which is 2nd most popular browser now?
Obviously currently no.1 is chrome but I am personally fan of Brave now because of privacy concerns and inbuilt support for crypto.
Mozilla also held major market share until Microsoft Edge was also rebuilt on Chromium engine. It is the same engine used by Chrome by Google.
Now wonder, people now like Edge more now because it feels more light and fast. I can't say anything ram consumption because its always a lot with almost every browser,
All of these are still commercial products which sell their user data to advertisers and that is the reason why I like Brave more. I think slowly with time it will gain more market share and compete with these mainstream browsers.