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PowerFox vs Momiji: catalog facts
PowerFox	Momiji
Free Free to download; described by the project as open source.	Free Free and open source under the MPL-2.0 licence.
macOS	macOS
Runs on PowerPC and Intel Macs back to Mac OS X 10.3 Modern TLS 1.3 and cipher support on unsupported systems	Modern Firefox ESR engine on macOS 10.7 to 10.14 Supports 64-bit Macs back to Conroe and Merom processors
Only for older Mac OS X and macOS releases Older hardware limits performance on heavy modern sites	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.