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WaterfoxSeaMonkey
Free

Free and open source under MPL-2.0. Development is funded by donations.

 Free

The software is free under its open-source licence. Hosting, hardware and external…

Windows, macOS, Linux Windows, macOS, Linux
  • Telemetry and data collection are removed from the build, not just disabled in preferences
  • Ad blocking and private, anonymised DNS are on by default
  • It is the continuation of the old Mozilla Application Suite, so browsing, mail, news and page editing live…
  • One small team tracking Mozilla, so security updates land after Firefox's
  • The project has changed hands in the past, which matters if you are picking it on trust
  • It tracks an older Firefox codebase, so web compatibility and security hardening trail the current browsers.
Downloadable app Downloadable app
Open source Open source
License: MPL-2.0 License: MPL-2.0
No account needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked September 21, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.