Chromium, Firefox, or an independent engine
Brave, Helium, and Flow use Chromium/Blink, providing broad compatibility and Chrome extensions but keeping them in the same engine ecosystem. Zen, Waterfox, LibreWolf, and modern Midori use Firefox/Gecko and Firefox extensions, supporting engine diversity and privacy customization. Ladybird is developing a new engine from scratch, which matters for diversity but has much further to go in web compatibility.
Brave and Helium
Helium is the closest fit for users who want Brave's Chromium compatibility without Brave's wider product ecosystem. Both offer Chrome extensions and privacy protections such as tracker and ad blocking and HTTPS protections. Helium minimizes built-in rewards, wallet, search, VPN, AI, and cloud services.
Brave and LibreWolf
LibreWolf takes a more aggressive privacy approach than Brave, starting from Firefox, removing telemetry and sponsored content, including uBlock Origin, and hardening defaults. This can improve privacy but may cause more site compatibility problems or restrict DRM depending on setup.
Brave and Zen Browser
Zen is less focused on maximum privacy hardening and more focused on productivity and customization. Vertical tabs, workspaces, split views, compact mode, themes, and Zen Mods are central to its Firefox-based experience.
Tracker and ad blocking
Helium includes strong default ad and tracker blocking. LibreWolf ships with uBlock Origin. Waterfox includes native blocking capabilities, and modern Midori provides a privacy extension based on the uBlock Origin filtering engine. Zen relies more on Firefox's privacy architecture and extensions.
Engine diversity and maturity
Switching from Brave to Helium or Flow changes the browser but not its Chromium engine. Moving to Zen, Waterfox, LibreWolf, or Midori moves to Gecko. Ladybird is the only project here building a genuinely independent engine, but it is experimental and not yet a production-ready Brave replacement.