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About

Phyrox Developer Edition portable app made with Portapps.
Run Mozilla Firefox Developer Edition as a portable app.

Latest version 153.0b8
Internal release 54
Last updated 2026/07/05
Links
Maintainer CrazyMax
Homepage https://www.mozilla.org/en-US/firefox/developer
License Mozilla Public License 2.0
Changelog CHANGELOG.md

Installation

Download and install the latest portable setup where you want then run phyrox-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 phyrox-developer-portable.exe and remove Firefox Developer Edition from your computer.

Upgrade

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

Infos

Following a trademark violation report (#5) from Mozilla, Firefox Developer Edition portable has been named Phyrox Developer Edition portable on Portapps. Nothing changes except its name.

Standard and ESR (Extended Support Release) are also available

Modifications

Some modifications have been made 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.
  • Crash reporter: Disabled by default and configurable.
  • Profile: Profile path is overrided to data\profile folder (see below).
  • A shortcut is created at launch to allow native notifications and removed when Firefox is closed

Configuration

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

app:
  profile: default
  multiple_instances: false
  disable_telemetry: false
  disable_crash_reporter: true
  cleanup: false
  • profile : Name of the profile created in data\profile\<name> (default default)
  • multiple_instances : Allow multiple instances (default false)
  • disable_telemetry : If enabled, telemetry is not uploaded and Firefox studies are disabled (default false).
  • disable_crash_reporter : If enabled, the crash reporter is disabled (default true).
  • cleanup : Cleanup leftover folders (default false)

Policies

You can use custom policies by creating data/policies.json file like this one:

{
  "policies": {
    "AIControls": {
      "Chatbot": false,
      "History": false,
      "Pdf": false,
      "SmartTabGroups": false
    },
    "IPProtectionAvailable": false
  }
}

DisableAppUpdate and DontCheckDefaultBrowser are awlays forced to true.

DisableTelemetry and DisableFirefoxStudies are forced to true when disable_telemetry is enabled in the main configuration file.

Known issues

There is no known issues Please let us know if you found one!

Download

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