Firefox Developer Edition
Firefox Developer Edition
71.0

5.0

Firefox Developer Edition free download for Mac

Firefox Developer Edition

71.0
12 November 2019

Official Firefox release channel for experimental (beta) builds.

Overview

Firefox Developer Edition (was Aurora) is the rapid-fire release channel for the next iteration of the Firefox Web browser. The Developer channel is where users can test the latest features and innovations. Users can expect an increase in polish from the raw, cutting edge features in the nightly builds. These releases may not be as stable as beta or final releases.

With Firefox Developer Edition:

  • Experience the newest innovations in an unstable environment that's not for the faint of heart
  • Provide feedback on features and performance to help determine what makes the final release

What's new in Firefox Developer Edition

Version 71.0 (Beta 9):
New
  • Firefox has a new command line parameter, --kiosk, that opens Firefox in fullscreen mode
  • Windows users now have the ability to pop out videos on the web into an always-on-top video player using the Picture-in-Picture feature! For most videos, this can be accomplished by hovering the video with the mouse, and clicking on the Picture-in-Picture toggle.
  • Locales added: Catalan (Valencian) (ca-valencia), Tagalog (tl), Triqui (trs)
Changed
  • Redesigned internal configuration page (about:config)
  • A new Certificate Viewer that is easier to use, with more features and more detailed information.
Developer
Web Platform
  • Subgrid greatly enhances the utility and flexibility of grid layouts by allowing the grid of a child to use the tracks defined on the parent. In addition, the DevTools grid inspector has been improved to support subgrid.

Join over 500,000 subscribers.

Subscribe for our newsletter with best Mac offers from MacUpdate.

18 Firefox Developer Edition Reviews

See all

Rate this app:

LeMerlot
03 August 2018

Most helpful

I use it daily.
Like (1)
Version 62.0
LeMerlot
03 August 2018
I use it daily.
Like (1)
Version 62.0
Dendrite535
03 August 2018
I think MacUpdates is very late off the blocks for this one. V. 62.0 came out about two weeks ago, now its up to 62.0.B13 The browser in its current edition has a few faults in rendering pages, but its not bad. There seems to be no way to offer feedback.
Like
Version 62.0
ggt667
03 September 2016
My all time favorite browser for developing home pages.
Like
Version 50.0a2
Big Johnson
20 January 2016
"Provide feedback on features and performance to help determine what makes the final release" Oooh, you mean like putting the tabs on top despite complaints from scores of users and refusing to provide a setting to change it because those users are just wrong? Obviously users' opinions are of no concern to the development team.
Like (2)
Version 45.0a2
kreiss
06 November 2015
I don't recommend this. Firefox is supposed to be free and open, and independent. The latest version from Mozilla, for Mac, is 42.0. But Version 44.0a2 (which I downloaded from Macupdate) is something quite different. My Sophos antivirus detected a PUA (potentially unwanted application) associated with it, and this could very well be that automatic Yahoo link, making Yahoo the default browser.. This is sneaky and unpleasant. Avoid Version 44.0a2. 42.0 which I downloaded direct from the Mozilla website, is fine.
Like
Version 44.0a2
Eric•Woehler
27 September 2015
FF 42b1 is a dog with plugins - repeat visits asking to allow plugins even though have allowed in past. More than 5 tabs open? Very slow? Repeat visit? Repeated request to allow plugins. Noticeably slower than FF41. Have reverted to FF41 and will test future beta releases.
Like
Version 43.0a2
Wts
03 March 2015
Why does Macintosh version always revert to using YAHOOOO as the internet search engine regardless of how many times i select GOOGLE ?

Oh, perhaps because development of FireFox is paid/sponsored by YAHOOOO.

Because of all the recent tweeking FireFox only deserves a one star rating.

Despite this serious flaw still use FireFox as my default browser.

What's with all this tweaking recently by Safari and FireFox?
Like
Version 38.0a2
2 answer(s)
WetNet
WetNet
03 March 2015
I feel for you and totally understand. . . but you're whining up the wrong forum. You really should get on the Mozilla forums or contact one of the developers on the Mozilla site. They do actually respond in a timely manner.
Like (1)
Wts
Wts
04 March 2015
" They do actually respond in a timely manner. "

Not in my experience with trying to cry my blues about the " new " Mac version of Firefox. Obviously they know the problem exists but since they are funded by Yahoo they don't want to lose the money and so will not fix the problem and also i may be the only guy that hates using Yahoo as a web search engine.

Thanks for you input/reply.
Like
ylluminate
21 January 2015
This would be a 4.5 star review if Mozilla would get their act together and integrate native Cocoa text fields into the app. Many of us have been asking them to integrate this for spelling and other transformation, etc. purposes for over a decade with no effort. This is the only reason Firefox is not my default browser. Their dark theme on this dev release is killer. So much is going in the right direction on the Mozilla foundation projects, but they have to get this going in order to make Firefox, Thunderbird and the like worth even an ounce of attention from so many users and developers that I know.
Like
Version 37.0a2
Akanico
21 January 2015
Since I wrote a comment in 2013 wishing that Mozilla would add the ability to easily use another profile for beta and nightly releases, I had to salute them for doing so. Even though I found a way back then to choose what profile to use each time I'm launching any version of their browser, it's great they made it automatic on this one. Web developer tools are better to use than before and the black theme looks a bit outdated but is nice, though.
Like
Version 37.0a2
Wts
14 January 2015
Hopefully FireFox gets better. I absolutely hate the last version with it's default to yahoooo search engine no matter how many times i've shut that selection off. At this point of time i give up on FireFox and have reluctantly switched to Safari . I strongly believe that FireFox is being funded by yahooo and the developers of FireFox are bending to the wishes of yahoo and are no longer an innovative completely independent browser developers. The developers of FireFox should issue their browsers Mac OS specific rather then, oh, this should work regardless which Mac OS you are using.
Like
Version 36.0a2
1 answer(s)
Monkeyjunkey
Monkeyjunkey
14 January 2015
It's no secret Mozilla is funded by Yahoo. But your complaint about the default search engine is a little off. Have you tried adjusting your default search engine to your liking? That should solve your problem. if that does not work, you should file a bug and post the link here for further tracking of the development around that problem, because then it is a bug.
Like (1)