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Mozilla Firefox Developer Edition, Portable

development web browser

Download from PortableApps.com

Version 149.0 Beta 1 for Windows x64, English
89MB download / 315MB installed
Notes | All Languages | Antivirus Scan | Details

Runs anywhere (cloud, removable, local) without 'installing'. Use the PortableApps.com Platform for easy installs and automatic updates.

Also Available: Firefox Stable, Firefox ESR (Extended Support Release), Firefox Beta, Firefox Nightly, Legacy versions

Make a Donation - Support PortableApps.com development & hosting, Make a Donation - Support Firefox Developer Edition development

Description

Mozilla Firefox is a fast, full-featured web browser that's easy to use. The Developer Edition adds in debugging and IDE tools as well as a unique theme to the standard beta channel of Firefox.

Learn more about Firefox Developer Edition...

Localizations

LanguageLinkSHA256 Hash
Chinese (Simplified)中文 (简体)Downloadd1685826c33c3191fcdb49e29bef8f8166bc12ad26888cd05c5ff9c5f7aea88e
Chinese (Traditional)正體中文 (繁體)Download210e58a57d4a14fb7511df14c837e31cb41f275d91c8b4b8d5654b72c354d11b
EnglishEnglishDownload5d40475c3755a497c8c6ed348cc6469b2a825d7243e90bb8b26afab3cd979bbb
FrenchFrançaisDownloadddd126f34870be3f3e3f5519a5e87fe9c869ab858e17f5a8bbac4e27cb883b41
GermanDeutschDownload70dd674f3d898e38e9fa2397f2cfa3049109aeb06c4f0c5e24b7fbbf8e93ebbc
HungarianMagyarDownload72f2f373382e7767f3267678531bc6e7990d9bee868ec7020c4f82f42148e7c2
ItalianItalianoDownloadf3bfff2bf8c3a14bdce7e518a13059e322ec086ecbf713cd6fffdd4bf445631f
Japanese日本語Download958bc8e3a97afc246a30fb8f5c6c01cad577e815849fc79df2432a3ec06aa85e
PolishPolskiDownloadeae53fe290a42461aaa07fa49548765b05781836744d49d25447254360187956
Portuguese (Brazilian)Português (do Brasil)Download24e7f8ebc7cbeedb8227e434d802a9d14d2f9d5db662575da31d48e971b492c7
RussianРусскийDownloadd4b10e441971f9d9f333844e62b8caa2d811629c6f7328d723381607e44ca6d7
Spanish (International)Español (internacional)Download5e81aaa51dd27204e3927733b761e3aad32acc6aedfd24fbb1e1f7914ce9600e

App Notes

The developer release will install alongside a standard Firefox Portable install in a FirefoxPortableDeveloper directory. Note that PortableApps.com will release one version for each major version (example: 99b1 but not 99b2). For updates within each major release, use the internal updater. From Mozilla: "This is pre-release software: you may encounter compatibility problems with some websites and add-ons."

Support

For help with this app, please see the following:

Download Details

Open Source Initiative Approved License
  • Publisher: Mozilla & PortableApps.com (John T. Haller)
  • Date Updated: 2026-02-25
  • Date Added: 2014-11-10
  • System Requirements: Windows 10, 11 & WINE (64-bit Only)
  • App License: Open Source (MPL under the Mozilla EULA)
  • Source: Firefox Developer Edition, Launcher source included, PortableApps.com Installer
  • SHA256 Hash: 5d40475c3755a497c8c6ed348cc6469b2a825d7243e90bb8b26afab3cd979bbb (English)

Mozilla®, Firefox® and the Firefox logo are registered trademarks of the Mozilla Foundation and are used under license.