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Arctic Fox vs Momiji: catalog facts
Arctic Fox	Momiji
Free Free, with the source code published on GitHub.	Free Free and open source under the MPL-2.0 licence.
Windows, macOS, Linux	macOS
Runs on old systems such as Mac OS X 10.6, Windows XP and PowerPC Linux Backports security fixes from Firefox and TenFourFox	Modern Firefox ESR engine on macOS 10.7 to 10.14 Supports 64-bit Macs back to Conroe and Merom processors
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	Hardware acceleration can be buggy and may need turning off DRM video such as Netflix and Spotify needs an extra Widevine install
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 2, 2026

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