Firefox Developer Version

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Current Release

Firefox release notes.
Firefox ESR current release notes.

Thunderbird current release notes.
SeaMonkey current release notes.

Mozilla firefox developer version

Upcoming Releases

Upcoming Firefox release dates are listed at RapidRelease/Calendar.
Thunderbird approximately (i.e. not strictly) follows the ESR schedule listed there.

Past Releases

The full list of Firefox release notes is available on
The full list of Thunderbird release notes is available on Old releases can be found at releases directory.

The current page applies to Firefox Developer Edition 76.0 (x64 ro) version 76.0 alone. A way to uninstall Firefox Developer Edition 76.0 (x64 ro) from your PC with Advanced Uninstaller PRO Firefox Developer Edition 76.0 (x64 ro) is an application offered by the software company Mozilla. Sometimes, computer users want to remove it. The Developers Edition aka Aurora is now same version as Beta but with the dev features. No Firefox is not doomed as a small minority have said that every so often for the past fifteen years and yet to happen. Firefox Developer Edition. Get the Firefox browser built just for developers. Check out the home for web developer resources. Firefox Reality. Explore the web with the Firefox browser for virtual reality. Donate your voice so the future of the web can hear everyone.

Archive of 2001–2015 releases by date.

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91,712 downloadsUpdated: April 23, 2021MPL / Donationware

Improve your browsing experience by getting your hands on the latest edition of Firefox with the new and improved Quantum engine and all the latest goodies

Firefox Developer Edition, also called Firefox Quantum, allows users to get their hands on the latest features and development tools which will eventually find their way into the mainstream, stable versions of Firefox.

One of the main differences between the latest developer editions and the ones from the past is that they're no longer based on the Aurora channel which has now been scrapped. Instead, the developer version is now based on the Beta channel.

Firefox developer version

New and improved engine is sure to win back former Firefox users

The star of the show is the new, next-generation engine which now allows Firefox to make the most of all your computer's CPU cores. The effects of those tons of performance improvements are pretty obvious from the first few seconds you start browsing.

Indeed, performance was one of the main goals, but you'll be pleased to hear that various privacy-related improvements have been added as well. For instance, Firefox Quantum is better equipped to block online trackers, as well as at keeping your privacy untouched than the generation it replaces.

Making life better for web developers, one of the top priorities of this new version of Firefox

Furthermore, there's a new set of developer tools available, on top of the ones you're already accustomed to from past versions of Firefox. The main highlights here are the comprehensive JavaScript debugger which is capable of targeting multiple browsers and the support for the CSS Grid which, along with other built-in tools (Style Editor, for example) makes it simple for you to create rich web layouts in the browser.

The Console, Network tabs, and the Inspector have all gained lots of useful new features, as well. For instance, the Inspector is now more suited for CSS work, and the Console supports message grouping and in-line object inspecting.

Refreshed looks thanks to a new user interface called Photon

There are other skin-deep changes as well. For instance, Firefox Quantum introduces a new GUI design-pattern, with a more 'pointy' feel, giving it a more modern look. Gone are the curvy tabs, replaced by clear-cut square tabs, and you can also say goodbye to the boring main menu which has been replaced with a new, better-organized one.

Speaking of tabs, note that Firefox Quantum boasts a new type of new tab window which adds the typical list of most-visited websites and a few recommended stories.

Redesigned engine, more performance, new looks, better developer tools, and an overall better package

All things considered, Firefox Quantum is the biggest leap forward we've seen in the last few years, and it's meant to give Firefox the well-deserved edge over its competition. This is, without a doubt, a very beneficial and a long-awaited overhaul for what is one of the best browsers out there.

Mozilla Firefox Developer Version

Filed under

Firefox Developer EditionUbuntu was reviewed by Vladimir Ciobica
New in Firefox Developer Edition 88.0b6:
  • New:
  • Added content blocking, a collection of Firefox settings that offer users greater control over technology that can track them around the web. In 63, users can opt to block third-party tracking cookies or block all trackers and create exceptions for trusted sites that don’t work correctly with content blocking enabled.
  • WebExtensions now run in their own process on Linux
  • Firefox now warns about having multiple windows and tabs open when quitting from the main menu. The Save and Quit feature has been removed. You can restore your session by ticking the box for Restore previous session in the General → Startup options or by using Restore Previous Session in the main menu.
Read the full changelog
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Firefox Developer Edition 89.0b3

Download Mozilla Firefox Developer Version

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18 screenshots:

Firefox Developer All Versions

runs on:
Windows 10 32/64 bit
Windows 8 32/64 bit
Windows 7 32/64 bit
file size:
52.6 MB
Firefox Setup 89.0b3.exe
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Firefox Developer Browser

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