Download Firefox For Developers

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One of my developers would like to use this edition of firefox, but because of our download restrictions against users we are unable to install it through the stub, can you help? I need the install file for the developer edition, rather then an install stub. Firefox 38 was released on May 12th, 2015. This article lists key changes that are useful not only for web developers, but also Firefox and Gecko developers as well as add-on developers. Mozilla Firefox Free Download - A faster, more secure and customizable Web browser. Mozilla Firefox Free Download - A faster, more secure and customizable Web browser. The browser is particularly popular with developers thanks to its open source development and active community of advanced users.

Version 89.0 Beta 1 for Windows, English
115MB download / 404MB installed
Notes All Languages Antivirus Scan Details

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

- Support Firefox Developer Edition development

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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.


Chinese (Simplified)中文 (简体)Download811f07248a5d53ad64ad53c46882ed1c
Chinese (Traditional)正體中文 (繁體)Download767b2fc4412ddd387b9fceaa253e3d7b
English (British)English (British)Downloadf5dca0bbf9f38780d7624f9ae96f3e94
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Portuguese (Portugal)Português (Europeu)Download904df2d521d722ef0b406c6fdf5d0a6f
Spanish (Spain)Español (de España)Download2454f16aa0c459cd520f42cf2858f82c
Spanish (International)Español (internacional)Download0f95dc8c3104ae59a9bc6e9fec88a5e2

App Notes

FirefoxThe 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: 78b1 but not 78b2). 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 Firefox For Developers

For help with this app, please see the following:

  • External: Publisher Support
  • Internet Support Forum

Download Details

Firefox Developer Download 64 Bit

  • Publisher: Mozilla & (John T. Haller)
  • Date Updated: 2021-04-22
  • 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: efd5bb81963b1d5550e536518886177a (English)
  • SHA256 Hash: 4fa8762edc461c9d4751b19716b680e6d6253ac204d2dc943df3e686a8a1570d (English)

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

About Firefox Developer Edition

Formerly known as Firefox Quantum, Firefox Developer Edition 89.0b3 is a specialized web browser built especially for web developers. Some of these tools and features eventually do make their way into the main Mozilla Firefox web browser. Stepping aside from the main development branch of Firefox, Firefox Developer offers a number of features that are currently not present in Firefox, namely beta features and tools for web development. This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system/platform without restrictions. Firefox Developer Edition is available to all software users as a free download for Windows.

Is Firefox Developer Edition safe to download?

We tested the file Firefox Setup 89.0b3.exe with 23 antivirus programs and it turned out 100% clean. It's good practice to test any downloads from the Internet with trustworthy antivirus software.

Does Firefox Developer Edition work on my version of Windows?

Older versions of Windows often have trouble running modern software and thus Firefox Developer Edition may run into errors if you're running something like Windows XP. Conversely, much older software that hasn't been updated in years may run into errors while running on newer operating systems like Windows 10. You can always try running older programs in compatibility mode.

Officially supported operating systems include 32-bit and 64-bit versions of Windows 10, Windows 8 and Windows 7.

What versions of Firefox Developer Edition are available?

Firefox Download Developer Version

The current version of Firefox Developer Edition is 89.0b3 and is the latest version since we last checked. This is the full offline installer setup file for PC. This site has hosted other versions of it in the past such as 89.0b1, 88.0b9, 88.0b7, 88.0b5 and 88.0b2. At the moment, only the latest version is available.

Mozilla Firefox For Developers Download

Alternatives to Firefox Developer Edition available for download

Download Firefox For Developers 2020

  • X-Firefox
    A portable version of the popular Firefox browser by Mozilla.
  • Firefox ESR
    A version of Mozilla Firefox for large organizations that's optimized for stability without major sudden changes.
  • Waterfox Portable
    A very fast browser running 64-bit code of Mozilla Firefox.
  • Firefox Portable
    Portable version of the versatile Firefox browser with support for passwords, history, bookmarks and of course the endless number of extensions and...
  • Opera Developer
    The cutting edge version of the Opera browser based on Chrome.
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    Fast, stable and free web browser with addons, customizations and a developer tools with a familiar user-interface.
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