Mozilla Launches Sleeping Beauty Aurora

by Briley 5

Mozilla Firefox LogoNo, we’re not talking about Disney’s princess Aurora (Sleeping Beauty); Mozilla has released a new version of Firefox called Aurora, which is designed to introduce a brand new stage in the popular web browser’s development cycle.

Google systematically releases new build versions for their Chrome browser every 6 to 8 weeks, which is more often than Mozilla.

Firefox 3 was released in 2008 (June 17) and the latest build, Firefox 4, was just recently released in March. Two to three years is a long time to wait for a new build of any internet browser (of course there are small updates along the way) and naturally Mozilla has to keep up with the competition especially if they want Firefox to remain in the spotlight. So in an effort to speed up development and release to the public sooner Mozilla has adopted a new release cycle for the Firefox internet browser.

New Mozilla Firefox Development and Release Cycle

Mozilla will now release in four development stages to prepare for every new Firefox version. A new channel (stage) has been introduced called the “Aurora” release which is the middle man in the Firefox development cycle.
Mozilla Firefox Release Stages

Mozilla will keep the Nightly builds (which includes features and tweaks that have not been tested by the Mozilla quality assurance team) as the first stage in the Firefox development cycle. In second will come the new “Aurora” release stage and of course the third will be the beta or public release version for testing purposes. The fourth and final stage will be the official build release or latest browser version release.

According to Damon Sicore (senior director of Mozilla engineering) on Mozilla’s blog, “The Aurora channel is where users can test the latest Firefox features and innovations. Users can expect an increase in polish from the raw, cutting edge features in our nightly builds. Aurora releases may not be as stable as beta or final releases.”

The last sentence in that quote above is very important to remember when using the “Aurora” channel of Firefox. The “Aurora” version will definitely include a more stable experience than the “Nightly” builds but that does not mean it will work perfectly. The “Aurora” version is still considered unfinished, which means there will be bugs and issues apparent throughout.

Sicore also said that the new Aurora version gives the community “more opportunities to participate in building Firefox”. Sicore went on further to say that the Aurora version will also speed up the rate at which new features, performance enhancements, security updates and stability improvements are added to the Firefox browser.

Mozilla Firefox Aurora Channel

The very first Aurora release, available for download now, introduces some of those performance, stability, and security enhancements Sicore was talking about. Aurora needs to be tested for bugs (just like any beta release) which is where standard users can help out. If you encounter a bug while running an Aurora Firefox build you can submit a support ticket, hopefully filled with specific details about the encountered bug.

Mozilla Firefox Aurora LogoThanks to the Aurora channel and increase in development speed users should now see Firefox moving from initial Aurora stage to Final release in about six weeks total (the stages actually go from Aurora to Beta, and then from Beta to Final). This now allows Mozilla to be up to par with competitors releasing on nearly the same schedule as Google.

Not only is this great news for Mozilla, but for standard Firefox users as well. It ultimately means the community will see Firefox 5 soon, and Firefox 6 not long after.

Anyone interested in more specific information on how the new Aurora channel and release cycle will work should visit Firefox Release Manager Christian Legnitto’s blog post here.

Otherwise to jump in and test out the new Aurora release channel users can download the latest version here.

Mozilla Introduces Firefox Aurora Version

What do you think of Mozilla’s new addition to the Firefox development and release cycle? Have you already downloaded the Aurora Firefox build and have experiences to discuss? Are you planning to just wait for the final release, if so why? Please join the discussion and let us know your thoughts and opinions in the Tech Labs dedicated Aurora forum thread.

Comments (5)

  1. I think it’s great that Mozilla has a new addition to Firefox. After downloading Firefox Aurora, I have noticed an improvement in performance and speed. I believe there are still plenty of more tweaks to be made to ensure user satisfaction. However, Firefox Aurora now gives Mozilla the chance to compete with Google Chrome. (

    -David @

  2. I have tried both Aurora and Nightly and both have the same problem: the 32 bit versions do not run!
    I get the following error:
    Microsoft Visual C++ Error
    Error R6034
    An application has made an attempt to load the C runtime library
    incorrectly. Please contact the application support team for more
    Once I get this error, FF Nightly freezes up and I have to forcible close it.
    Aurora does not freeze up, the error just keeps on coming up every few seconds.
    This happens whether I start in safe mode or not. I deleted the pluginreg.dat per the troubleshooting procedure and it did help.

    The plugins are enabled but none of the addins.

    In Nightly the 64-bit works but Roboform does not in 64-bit. I have reported this on the Nighly Newsletter, spent many hours trying to diagnose with no success.

    When I load 5 or 6 into a Windows XP. Vista or Windows 7 Virtual machine (VMware) I have no problem going back and forth between 32 and 64 bit versions.

  3. I just switched from the nightly build to the Aurora for a little more stability but was unaware that it updates daily also (I read somewhere). If this is true I might have to downgrade again to the Beta Release if I get tired of the updates.

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