I switched from Firefox to Floorp and haven't looked back. Less bloated, same features, haven't found an extension that isn't compatible yet.
Same with Fennec on Android.
This article is pretty poor overall. Why recommend Arc, a browser that requires a user account to even open a webpage, and which the author himself said will probably be disappearing in the near future as part of their own product strategy?
Lame clickbait aimed at nobody.