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Firefox vs IronFox: catalog facts
Firefox	IronFox
Free Free software from a non-profit-owned foundation. Mozilla sells separate subscription…	Free Free and open source under the MPL.
Windows, macOS, Linux, Android, iOS	Android
Total Cookie Protection stops cookies following you between sites An engine that is not Chromium, which matters for the health of the web	Hardened defaults and uBlock Origin built in, with no configuration needed Continues Mull's work under active maintenance
A small number of sites are still built and tested only against Chromium Mozilla’s revenue comes largely from a search deal, which shapes some defaults	Android only Hardened defaults break some sites until exceptions are made
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: MPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 22, 2026

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