Compare software

r3dfoxRetroZilla
Free

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

 Free

Free to download, with source code published on GitHub.

Windows Windows
  • Runs a current Firefox engine on Windows Vista and 7
  • Follows recent Firefox releases
  • Runs on Windows 95, 98, Me, NT 3.51 and NT 4.0
  • Improves web compatibility over the original Gecko 1.8.1 browsers
  • Small community project dependent on a few maintainers
  • Windows only
  • Rendering is roughly at Firefox 2.0 level, so many modern sites will not work
  • Does not target current versions of Windows
Downloadable app Downloadable app
Open source Closed source
License: MPL-2.0 License not stated
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked October 2, 2026

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