most common browser including chrome, windows, opera, and brave are using chromium. firefox and safari has its own browser engine.
Personally I use brave. Because windows, google tracks mostly your data and information.
Brave since it is owned by China there is a possibility also it tracks your data and information same as google and microsoft pero US naman ang track. so pili na lang kung sino gusto mo ma track yung data mo china or us.
Not sure if firefox has addressed its memory consumption when opening too many tabs.
safari bihira ko gamitin sa mac ko pero parang mabagal. (baka feeling ko lang)