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Firefox vs Cốc Cốc: catalog facts
Firefox	Cốc Cốc
Free Free software from a non-profit-owned foundation. Mozilla sells separate subscription…	Free Free to download; the company earns money from advertising and search.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Android, iOS
Total Cookie Protection stops cookies following you between sites An engine that is not Chromium, which matters for the health of the web	Built-in ad blocking and video downloading Vietnamese language tools and translation
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	Interface and support mainly in Vietnamese Proprietary, with a business built on advertising
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
No account needed	No 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 24, 2026

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