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Firefox Developer Edition vs Microsoft Edge Dev / Canary: catalog facts
Firefox Developer Edition	Microsoft Edge Dev / Canary
Free Free to download and use.	Free Free preview channels of Microsoft Edge.
Windows, macOS, Linux	Windows, macOS, Linux
Newest developer tools before they reach stable Firefox Builds for Windows, macOS and Linux, including ARM64	Access to upcoming Edge features and DevTools before general release Separate install from stable Edge, so both can coexist
Pre-release software, so it can be less stable than the regular release Not supported on Windows 8.1 and older or macOS 10.14 and older	Preview builds can be less stable than the regular release Not intended as a daily-driver browser for most users
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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