Mac browsers fall into three engine families: Safari on WebKit, Chromium-based browsers like Chrome, Brave, Edge and Arc, and Firefox with its derivatives on Gecko. The engine affects extension support, battery use and how sites render, while the interface decides how you manage tabs and workspaces.
Zen is a Firefox-based browser with vertical tabs and workspaces. Brave and Helium are Chromium-based with built-in ad blocking, and qutebrowser is keyboard-driven with Vim-style bindings. Safari is usually the most power-efficient choice on a Mac, so many people keep it for battery life and use a second browser for development or specific extensions.