Important: the engine decides compatibility and independence
Brave, Helium, and Flow use Chromium, so they keep Chrome extension compatibility and the best site compatibility, but they still depend on Google's engine. Zen, Waterfox, LibreWolf, and Midori use Firefox's Gecko engine, which diversifies the web but has a different extension ecosystem. Ladybird builds its own engine from scratch and is still in alpha.
Easiest switch from Chrome
Brave and Helium are the easiest switch: they use Chromium and run Chrome extensions, with ad and tracker blocking built in. Helium also supports Manifest V2 extensions, but it has no built-in sync or password manager. Flow keeps Chrome extension compatibility with a workspace-focused interface.
License details
Ladybird is BSD-2-Clause. Brave, Zen, Waterfox, LibreWolf, and Midori are MPL-2.0, while Helium and Flow are GPL-3.0. Brave includes optional integrated services such as Brave Rewards, which have separate terms.
Privacy-focused Firefox forks
LibreWolf applies hardened privacy settings with uBlock Origin, which can break some sites. Waterfox removes telemetry and adds native ad blocking and tree-style tabs, and Zen adds vertical tabs, split views, and workspaces. Midori is a lightweight Firefox-based browser from Astian.
Maintenance status
Ladybird, Zen, Helium, Brave, Waterfox, and LibreWolf were updated within days of this update. Flow's last commit was in May 2026, so its development is slower than the others. Ladybird is alpha software and not yet ready as a daily browser.