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Mozilla Firefox Developer Edition, Portable

development web browser

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Version 77.0 Beta 1 for Windows, English
96MB download / 354MB installed
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Mozilla Firefox Developer Edition, Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the Platform for easy installs and automatic updates.

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

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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.


App Notes

The developer release will install alongside a standard Firefox Portable install in a FirefoxPortableDeveloper directory. Note that will release one version for each major version (example: 69b1 but not 69b2). 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."

Download Details

Open Source Initiative
  • Publisher: Mozilla & (John T. Haller)
  • Date Updated: 2020-05-07
  • Date Added: 2014-11-10
  • System Requirements: Windows 7, 8, 10 & WINE
  • App License: Open Source (MPL/GPL/LPGL under Mozilla EULA)
  • Source: Firefox Developer Edition, Launcher source included, Installer
  • MD5 Hash: 74b7dd652250c5bc50d026cf14bdea1a (English)
  • SHA256 Hash: d91c73475fccfeea3664d1de3e4d138875a5b28f96fab0057c14a69406b579f2 (English)

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