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Firefox Focus vs Onion Browser: catalog facts
Firefox Focus	Onion Browser
Free Free to download on Android and iOS.	Free Free and open source under the MIT licence.
Android, iOS	iOS
Tracker blocking turned on by default One-tap erase of history, passwords and cookies	Tor browsing on iOS with per-tab circuit control and security levels Endorsed by the Tor Project
Mobile only, with no desktop version Wiping sessions means logins and history are not kept	iOS forces it onto WebKit, so it cannot match Tor Browser's fingerprint protections Browsing over Tor is noticeably slow
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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