You can do a review search online of sites that compare browsers and how they functions. Mozilla doesn't try to compete with other browsers they create a browser for their user base and how they customize it from the default is up to the user themselves.

How better is Mozilla compared to others?

It is not a Chrome or Chromium based web browser for starters and that is a good thing. Edge and Opera had their own browser engines but then they downgraded to being Chromium based.

Also the name is Mozilla Firefox or Firefox for short.