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Mozilla Firefox Developer Edition, Portable

development web browser

Download from PortableApps.com

Version 139.0 Beta 1 for Windows x64, English
68MB download / 240MB 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)Downloadc21f6fc01400fa2dd1272d9912e857bbe05e962b4c50ad766fb1d5c8b2ac96c4
Chinese (Traditional)正體中文 (繁體)Downloada0657b682b8b3fc6c23f4289515a8f92eddd45aaa73c34acc2398220e76ad1f2
EnglishEnglishDownload2f824e72b672ae1acbaca269a9c70341e5d55bcc43c1d600f0db295b6df6a893
FrenchFrançaisDownload0b011c72deb446175cac2650d9bf9535d90acae9369616ff7786173ad01bc81d
GermanDeutschDownloadba65ff1109c92ae29b458e4e7c44cf6d745751b78c67e1a43945d62ffd95eb98
HungarianMagyarDownload85d5f779df606b657bb7bcfbea6644e31844dc918499c9dbc8004c4cb635ccbd
ItalianItalianoDownload8c2d7aecbd54a4fcb626df5cfcca8c7ed54b4f8a4f9638c469d9803904804cbe
Japanese日本語Downloadc7a22a218e76ea7abd9e86f9c307d4dfe919d7d27eecc925d03ffa7ebbf8a576
PolishPolskiDownload4233442b82a44fa935d05a8051cac12b2cc799fa54c6c81fc4b6ce9a26387d1b
Portuguese (Brazilian)Português (do Brasil)Download1dfe05c8e595409ce5e3c82723c485a52102bcb878a9b513bfbc992642a770f5
RussianРусскийDownloadd2767fc4ca364b3d10a8b781e6fbdc274b7fe6cbfce6b5284c7f7c00cd6c35dd
Spanish (International)Español (internacional)Downloadd1ccd4c3c7c7d10c381e762d01e3f09cce681acbe8e1709ac33f29ee36a71531

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: 2025-04-30
  • Date Added: 2014-11-10
  • System Requirements: Windows 10, 11 & WINE (64-bit Only)
  • App License: Open Source (MPL/GPL/LPGL under Mozilla EULA)
  • Source: Firefox Developer Edition, Launcher source included, PortableApps.com Installer
  • SHA256 Hash: 2f824e72b672ae1acbaca269a9c70341e5d55bcc43c1d600f0db295b6df6a893 (English)

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