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Microsoft Edge Dev / Canary vs Firefox Nightly: catalog facts
Microsoft Edge Dev / Canary	Firefox Nightly
Free Free preview channels of Microsoft Edge.	Free Free and open source.
Windows, macOS, Linux	Windows, macOS, Linux
Access to upcoming Edge features and DevTools before general release Separate install from stable Edge, so both can coexist	Earliest access to new Firefox features Updated daily
Preview builds can be less stable than the regular release Not intended as a daily-driver browser for most users	Pre-release builds can be unstable Not suited as a main browser for most people
Downloadable app	Downloadable app
Closed source	Open source
License not stated	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 September 24, 2026

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