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Pale Moon vs r3dfox: catalog facts
Pale Moon	r3dfox
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free and open source, based on Firefox's Mozilla Public License code.
Windows, macOS, Linux	Windows
It keeps the pre-Quantum Gecko engine and the old XUL extension model, so add-ons that Firefox dropped still…	Runs a current Firefox engine on Windows Vista and 7 Follows recent Firefox releases
The source is MPL but the official binaries carry a separate branding licence, and its older engine misses…	Small community project dependent on a few maintainers Windows only
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: MPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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