Firefox Developer Edition 161.0b1 for Mac
Mac UtilitiesFirefox Developer Edition is a version of Firefox built specifically for people who make websites. Mozilla takes the beta code base and adds developer focused tools and settings, so you can test upcoming browser features and debug your sites before the general public release arrives. It runs with its own profile and its own path, which means you can keep it installed alongside the normal Firefox or Firefox Beta on your Mac and switch between them freely while you work.
Key Features
- The latest Firefox DevTools in beta, including the CSS Grid inspector and the WebSocket Inspector
- A multiline console editor for writing and testing longer pieces of JavaScript
- Hints for inactive CSS, showing which style rules have no effect and why
- Preferences tailored for developers, with browser and remote debugging switched on by default
- A separate profile and install path, so it never disturbs your everyday browsing setup
- Early access to experimental web platform features before they reach the stable release
How to Download
Mozilla publishes this edition on its own developer channel page. Open the official page, download the macOS build, open the disk image and drag the app into your Applications folder. It updates itself through the beta channel as new builds are released. Download from the official site
Frequently Asked Questions
Is Firefox Developer Edition a beta product? Yes. It is built on the Firefox Beta channel, so version numbers carry a b suffix, for example 161.0b1. It is stable enough for daily development work, but it exists to preview what is coming next.
Can I run it next to normal Firefox? Yes. It uses a separate profile by design, so your bookmarks, logins and settings in the regular browser stay untouched.
Is it free? Yes. Like every Firefox release, Developer Edition is free and open source from Mozilla.
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