Well, the browsers go only into 3 categories:
- Chromium based on Blink (Chromium, Chrome, Opera, Edge, Vivaldi, Brave, ...)
- Chromium based on Webkit (Safari)
- Gecko (Firefox)
I am a web developer and when I export game for web I test Safari, Firefox and Chrome. In most cases the game works in all or is not working well in Safari or Firefox. Chrome is the only one always up to date.