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Arctic Fox vs r3dfox: catalog facts
Arctic Fox	r3dfox
Free Free, with the source code published on GitHub.	Free Free and open source, based on Firefox's Mozilla Public License code.
Windows, macOS, Linux	Windows
Runs on old systems such as Mac OS X 10.6, Windows XP and PowerPC Linux Backports security fixes from Firefox and TenFourFox	Runs a current Firefox engine on Windows Vista and 7 Follows recent Firefox releases
Based on an old Pale Moon engine, so modern sites may not render well Often has to be built from source on less common platforms	Small community project dependent on a few maintainers Windows only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MPL-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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