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Notice of Non-Affiliation and Disclaimer

Portapps is not affiliated, associated, authorized, endorsed by, or in any way officially connected with Firefox™ Developer Edition, or any of its subsidiaries or its affiliates.

The official Firefox™ Developer Edition website can be found at

The name Firefox™ Developer Edition as well as related names, marks, emblems and images are registered trademarks of their respective owners.


Firefox™ Developer Edition portable app made with Portapps.
Developer Edition of Firefox web browser developed by The Mozilla Foundation.

Latest version 71.0b5
Internal release 23
Last updated 2019/10/29
Maintainer CrazyMax
License Mozilla Public License 2.0


Download and install the latest portable setup where you want then run firefox-developer-portable.exe.

If you have already installed Firefox™ Developer Edition from the original setup, move the following files :

  • %APPDATA%\Mozilla\Firefox\Profiles\*.default\* to data\profile\default

Then run firefox-developer-portable.exe and remove Firefox™ Developer Edition from your computer.


For an upgrade, simply download and install the latest portable setup.


Standard and ESR (Extended Support Release) are also available


Some modifications have been made in this version of Firefox™ Developer Edition through policies to ensure portability :

  • Disable updater : Firefox™ Developer Edition updates are turned off.
  • Don’t check default browser : Stops Firefox™ Developer Edition from checking if it is the default browser at startup.
  • Profile: Profile path is overrided to data\profile folder (see below).


FFirefox™ Developer Edition portable can be configured through the main YAML configuration file :

  profile: default
  multiple_instances: false
  disable_telemetry: false
  disable_firefox_studies: false
  • profile : Name of the profile created in data\profile\<name> (default default)
  • multiple_instances : Allow multiple instances (default false)
  • disable_telemetry : If enabled, Firefox™ Developer Edition telemetry is not uploaded (default false)
  • disable_firefox_studies : If enabled, Firefox™ Developer Edition will never run SHIELD studies or do Heartbeat surveys. (default false)

Known issues

Here is the list of known issues with this portapp:


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Otherwise you can download directly from the releases page on GitHub.