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Firefox Beta and Developer Edition
Release Notes

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

83.0beta Firefox Beta

October 20, 2020

Version 83.0beta, first offered to Beta channel users on October 20, 2020


  • A major update to Firefox JavaScript JITs engine (codenamed Warp) is now activated by default and brings some nice speed improvements. If you find any issues, please file bugs blocking bug 1613592 .

  • WebRender is now activated on Intel Gen12 GPUs

  • There is now a "Print selection" context menu item.

  • Device sharing state indicator icons have been added to the system tray on Windows

  • Users with touchscreens and precision trackpads can now use pinch gestures on those devices to zoom web content without reflowing

  • Added an option in about:preferences to disable control of media via keyboard, headset and virtual interface.


  • Fix for MFSA 2020-49 included in version 83.0b10 and newer.

  • For users on macOS with minimized windows, Firefox now uses much less power and you should see much longer battery life.


  • HTTP authentication prompt dialogs are now tab-modal instead of window-modal


  • You can now click on the "scroll" badge for scrollable elements to toggle highlighting of the overflow causing elements, which also have a new "overflow" badge next to them

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