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Firefox ESRFirefox
Free

Free and open source; Mozilla offers optional paid professional support for organisations.

 Free

Free software from a non-profit-owned foundation. Mozilla sells separate subscription…

Windows, macOS, Linux Windows, macOS, Linux, Android, iOS
  • Long-term stable feature set for managed deployments
  • MSI and PKG installers plus group policy templates
  • Total Cookie Protection stops cookies following you between sites
  • An engine that is not Chromium, which matters for the health of the web
  • New features arrive later than in regular Firefox
  • Mainly aimed at organisations rather than home users
  • 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
Downloadable app Downloadable app
Open source Open source
License: MPL-2.0 License: MPL-2.0
No account needed No account needed
Not stated if it works offline Works offline

Checked September 24, 2026

Checked September 20, 2026

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