1. Firefox – tons of tools for web developers!

    • by Robert Nyman • Add-ons, Aurora, CSS, Debugging, Developer Tools, Featured Article, Firebug, JavaScript, Web Developers • 85 comments

    One of the goals of Firefox have always been to make the lives of web developers as easy and productive as possible, by providing tools and a very extensible web browser to enable people to create amazing things. The idea here is to list a Read more…

  2. JavaScript speedups in Firefox 3.6

    • by Alix Franquet • Featured Article, Firefox, Firefox 3.6, JavaScript, TraceMonkey • 85 comments

    This post was written by David Mandelin who works on Mozilla’s JavaScript team. Firefox 3.5 introduced TraceMonkey, our new JavaScript engine that traces loops and JIT compiles them to native (x86/ARM) code. Many JavaScript programs ran 3-4x faster in TraceMonkey compared to Firefox 3. (See Read more…

  3. an overview of TraceMonkey

    • by Christopher Blizzard • 35 Days, Feature, Firefox 3.5, JavaScript, TraceMonkey • 68 comments

    This post was written by David Mandelin who works on Mozilla’s JavaScript team. Firefox 3.5 has a new JavaScript engine, TraceMonkey, that runs many JavaScript programs 3-4x faster than Firefox 3, speeding up existing web apps and enabling new ones. This article gives a peek Read more…

  4. new device API for Firefox 3.6: orientation

    • by Christopher Blizzard • Device APIs, Feature, Featured Demo, Firefox 3.6, JavaScript • 61 comments

  5. what does tracemonkey feel like?

    • by Christopher Blizzard • 35 Days, Canvas, Demo, Firefox 3.5, JavaScript, TraceMonkey • 61 comments

  6. cross-site xmlhttprequest with CORS

    • by Arun Ranganathan • 35 Days, JavaScript, Standards, XMLHttpRequest • 41 comments

    XMLHttpRequest is used within many Ajax libraries, but till the release of browsers such as Firefox 3.5 and Safari 4 has only been usable within the framework of the same-origin policy for JavaScript. This meant that a web application using XMLHttpRequest could only make HTTP Read more…

  7. using HTML5 video with fallbacks to other formats

    • by Laura Thomson • 35 Days, Demo, Firefox 3.5, JavaScript, Video • 37 comments

  8. saving data with localStorage

    • by Christopher Blizzard • 35 Days, DOM, Feature, Firefox 3.5, JavaScript • 36 comments

    This post was written by Jeff Balogh. Jeff works on Mozilla’s web development team. New in Firefox 3.5, localStorage is a part of the Web Storage specification. localStorage provides a simple Javascript API for persisting key-value pairs in the browser. It shouldn’t be confused with Read more…

  9. XHR progress and rich file upload feedback

    • by Austin King • 35 Days, Feature, Firefox 3.5, JavaScript, XMLHttpRequest • 36 comments

    This demo is by Olli Pettay (smaug) with help from Austin King. A common limitation on the web today has been a rich file upload widget for web applications. Many sites use Flash or a desktop helper applications to improve the experience of uploading files. Read more…

  10. Firefox 4 Performance

    • by stormy • Firefox, Firefox 4, JägerMonkey, JavaScript, Performance, TraceMonkey • 33 comments

    Dave Mandelin from the JS team and Joe Drew from the Graphics team summarize the key performance improvements in Firefox 4. The web wants fast browsers. Cutting-edge HTML5 web pages play games, mash up and share maps, sound, and videos, show spreadsheets and presentations, and Read more…