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Basiliskr3dfox
Free

The open-source application is available without a license fee.

 Free

Free and open source, based on Firefox's Mozilla Public License code.

Windows, macOS, Linux Windows
  • Runs classic XUL extensions that no current browser supports
  • Independent of Chromium and of current Firefox
  • Runs a current Firefox engine on Windows Vista and 7
  • Follows recent Firefox releases
  • Small development team, so security fixes and web compatibility lag
  • Many modern sites do not work correctly
  • Small community project dependent on a few maintainers
  • Windows only
Downloadable app Downloadable app
Open source Open source
License: MPL-2.0 License: MPL-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 1, 2026

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