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Firefox vs Shift: catalog facts
Firefox	Shift
Free Free software from a non-profit-owned foundation. Mozilla sells separate subscription…	Freemium A limited free tier is available. More accounts and spaces require a paid subscription.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux
Total Cookie Protection stops cookies following you between sites An engine that is not Chromium, which matters for the health of the web	Several accounts of the same service signed in at once, separated by space
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	Most spaces and account slots require a paid plan Closed source and memory-hungry
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
No account needed	Account 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.