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Waterfox vs Basilisk: catalog facts
Waterfox	Basilisk
Free Free and open source under MPL-2.0. Development is funded by donations.	Free The open-source application is available without a license fee.
Windows, macOS, Linux	Windows, macOS, Linux
Telemetry and data collection are removed from the build, not just disabled in preferences Ad blocking and private, anonymised DNS are on by default	Runs classic XUL extensions that no current browser supports Independent of Chromium and of current Firefox
One small team tracking Mozilla, so security updates land after Firefox's The project has changed hands in the past, which matters if you are picking it on trust	Small development team, so security fixes and web compatibility lag Many modern sites do not work correctly
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
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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