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Arctic Fox vs Serpent: catalog facts
Arctic Fox	Serpent
Free Free, with the source code published on GitHub.	Free Free to download.
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 on Windows XP and later Builds are GPG-signed for verification
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	Unofficial builds with no upstream affiliation Distributed as archives in a bare file directory with no installer
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
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 2, 2026

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