Firefox Developer
Edition

Firefox Developer Edition (was Aurora) is the rapid-fire release channel for the next iteration of the Firefox Web browser. The Developer channel is where users can test the latest features and innovations. Users can expect an increase in polish from the raw, cutting edge features in the nightly builds. These releases may not be as stable as beta or final releases.

With Firefox Developer Edition:

• Experience the newest innovations in an unstable environment that's not for the faint of heart
• Provide feedback on features and performance to help determine what makes the final release

New:

• Firefox 67 will be able to run different Firefox installs side by side by default.
• Tabs can now be pinned from the Page Actions menu in the address bar
• Users can block known cryptominers and fingerprinters in the Custom settings or their Content Blocking preferences
• The Import Data from Another Browser feature is now also available from the File menu
• Added a new about:compat page which allows the user to see, and temporarily disable, active site interventions in both Firefox for Desktop and Firefox for Android
• Firefox will now protect you against running older versions of Firefox which can lead to data corruption and stability issues.

Changed:

• Firefox no longer supports handling webcal: links with 30boxes.com
• Change to extensions in Private Windows: Any new extensions you add to the browser won’t work in Private Windows unless you allow this in the settings.

Developer:

• The DevTools Changes panel now supports copying modified CSS. You can either copy the full changes or individual changed rules.