Firefox 3.5 for 35 days – dreaming about the future of the web

35 days logo

Over the next 35 days we’ll be talking about all of the new developer features in Firefox 3.5.

The upcoming release of Firefox 3.5 is a big upgrade for users.  It includes new privacy features, improvements in interactive performance and a new JavaScript engine that will improve the experience for users using script-heavy web sites.  These are all features that users will appreciate and talk about.

But what Firefox 3.5 really represents is a huge upgrade to the web itself.  We’ve included support for audio, video, threads in JavaScript, new canvas features, tons of new CSS features, downloadable fonts and geolocation.  While Firefox 3 was a signifigant upgrade for the web’s users, Firefox 3.5 does the same for developers.

Because of the sheer volume of new features for developers in Firefox 3.5 we’ll be spending the next 35 days featuring all of them, with two posts a day, every day.  Each day’s first post will describe one new feature in Firefox in depth – how to use it, why it’s there and some examples of what it can do for you.  The second post will be all fun – examples of demos that people have put together using all of the features that are in Firefox 3.5.

Like much of what we do at Mozilla this is a community-led project. We’ve reached out to members of the Mozilla and web developer community for posts and demos.  Some posts will be written by core Mozilla hackers, but many of them will be written by people who are just excited about the chance to use this technology in the wild.

My personal belief is that these posts represent Mozilla’s dreams for the future of the web.  We are not a company like every other browser vendor – our core mission is to improve and protect the web.  Firefox 3.5 represents what we think the next stage of the web will be – interactive applications, video, web sites collaborating and sharing information – all via the browser.  Our hope is that each of you will take what we post here, encourage other browser vendors to implement similar features where they haven’t already, and do your part to keep the web vibrant.


  1. […] Pues todo indica que vuelven a la carga. Ahora han anunciado en que le dedican 35 a ir explicando todas las noveades y ventajas de la nueva versión: Firefox 3.5. […]

    June 10th, 2009 at 17:35

  2. […] This post was Twitted by juaneladio – […]

    June 10th, 2009 at 17:51

  3. Jessica

    @ CG: You’ve got it @$$-backwards… Mozilla builds the browser; the independent developers rework the add-ons to work within the new browser version.
    @Alan & Lycanthrope: I totally agree with both of you. Less fluff/bloat, lightning-fast, add-ons only if you want ’em. Look at how popular salad bars have become. Why? They let YOU personalize the salad to your tastes. Who could ever contest that?! FF rocks, and I’m a REALLY impatient b!t©h, so give us 3.5 now, Mozilla, or I’m calling my Daddy! ;)

    June 10th, 2009 at 18:29

  4. Cristiandlr

    Sounds great! cant wait anymore :)

    June 10th, 2009 at 19:56

  5. Sheikh Nadia Hassan

    I am using firefox 3.5b4 and I can say it’s simply awesome, but seriously more 35 days of waiting is not cool. why don’t you people try to speed up the release(just kidding). You guys have done a great job and I am proud to be a part of it.

    June 10th, 2009 at 20:59

  6. dieq41

    waiting 4 my fav browser…

    June 10th, 2009 at 21:14

  7. Another Indian Kid

    I hope the final release comes out cool.

    The Beta-version is available though.

    June 10th, 2009 at 23:08

  8. Abir-v12

    FoXy Rules…

    June 10th, 2009 at 23:18

  9. (-:SMo:-)Vader

    Firefox ftw.

    June 11th, 2009 at 07:19

  10. […] claim that this is a nice idealism with no practical benifit, or not how the real world works.  In fewer than 35 days, Mozilla will show you how well this approach works in the real […]

    June 11th, 2009 at 07:22

  11. Mike

    Guys, first off the features in 3.5 are NOT bloat.

    Geolocation lets web sites know your physical location (if you choose, off by default) (think google maps)

    Audio/video elements are for sites to embed video and audio WITHOUT the use of flash… and you can manipulate these video’s with JS. So this means videos can have an effect on the page… the page to the video… trigger events… the sky is the limit.

    TraceMonkey is the new javascript engine… The latest nightly is now faster at Sunspider benches than chrome 1(whoa!) (1423ms vs 1556ms)

    Private Browsing is just that.

    However, Mozilla outlined that the next version (3.6 ATM, and not that i can’t wait for 3.5!!) is really the dream come true… they’re going to implement lightweight themes and add-ons, and increase start-up time, UI interactions, etc. noticeably. The same improvements that doubled Firefox 3.5 browser’s java script performance is going to be used internally for the UI.

    Firefox 3.5 most certainly rocks as loading facebook and other JS intense sites is a quick, short and painless… I’d go as far to say it takes a 3rd the time on average, and i can’t wait to see sites that start using the video/audio elements. Like the article states, this is a treat to the developers, we’ll get more presents from mozilla with the next version :p

    June 11th, 2009 at 09:39

  12. Mike

    whoops the sunspider tests are 1223ms to 1254ms (FF3.5 to Chrome 1)

    June 11th, 2009 at 09:41

  13. […] il link ai post che nei prossimi “35 giorni” racconteranno Firefox 3.5 in dettaglio: Sempre nell’ambito delle attività create per dare il benvenuto al nuovo Firefox 3.5, […]

    June 11th, 2009 at 11:33

  14. Neil

    I am a longtime fan of Firefox. I have used it and loved it since it was Phoenix 0.3.

    So far I’m not impressed with FF 3.5. I have tried beta 4 and beta 99. There are many sites and pages that just won’t load.

    June 11th, 2009 at 20:06

  15. […] demo was created by René-Luc D’Hont. He created this demo for the 35 days project with open source software and open data from various projects. His company, 3Liz, specializes in […]

    June 12th, 2009 at 19:50

  16. […] the mozilla 35 days project, I created a demo which used Geolocation with open source software and open data from various […]

    June 15th, 2009 at 07:17

  17. Md. Mamun Al Rshid

    I would like to upgrade firrfox with facebook.

    June 17th, 2009 at 04:09

  18. […] during the run up to, and day of, launch.  Promote existing campaigns like Fastest Firefox, or 3.5 in 35 days.  Highlight your favorite features and let everyone know when you upgrade.  For Twitter and […]

    June 19th, 2009 at 23:48

  19. Mithgol the Webmaster

    The address should exist and redirect to

    June 23rd, 2009 at 02:39

  20. […] we released Firefox 3.5, which as we said at the beginning of the 35 days project is a huge upgrade for both end users but also for the […]

    June 30th, 2009 at 08:21

  21. Renwick

    I too am an ardent fan for Firefox and have been looking forward to upgrading to 3.5. Now that has happened I am extremely disappointed to find that it takes upwards of 8 minutes to start. This is totally unacceptable and will have to switch to IE until the problem is fixed.

    July 3rd, 2009 at 01:02

  22. […] 原文地址: […]

    July 3rd, 2009 at 02:55

  23. […] which will attempt to further organize and build Mozilla’s visual-design community, and Mozilla Hacks, which will highlight the features of Firefox 3.5 with 35 days of demos. This is all in addition to […]

    August 27th, 2009 at 14:00

  24. […] 원본: Firefox 3.5 for 35 days – dreaming about the future of the web by Christopher […]

    April 14th, 2010 at 12:43

  25. ksmigo

    please tell me how i can downlod fro free real firefox 3.5

    February 25th, 2011 at 05:17

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