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  1. Firefox Developer Edition 38: 64-bits and more

    • by and • Developer Tools, Featured Article, Firefox, Games • 23 comments

    In celebration of the 10th anniversary of Firefox, we unveiled Firefox Developer Edition, the first browser created specifically for developers. At that time, we also announced plans to ship a 64-bit version of Firefox. Today we’re happy to announce the next phase of that plan: Read more…

  2. Web Animation tools, Network Security insights, Font Inspector improvements and more – Firefox Developer Tools Episode 37

    • by • Developer Tools, Featured Article, Firefox, Firefox Development Highlights, Firefox Nightly • 2 comments

    A handful of bug fixes, improvements and some new features, of course, just landed in Firefox 37. Update your Firefox Developer Edition, or Nightly builds to try them out! Animation Inspector Panel A new API that’s quickly gaining traction is the Web Animations API, allowing Read more…

  3. 2014: Mozilla Hacks looks back

    • by • Featured Article, Firefox, Firefox OS, Mozilla • 10 comments

    Wherever you live, it’s a season of work holidays, school vacations, year-end blog posts, and lists. The Hacks blog will be back in early January 2015 to continue writing for developers about the products and technologies created by Mozilla and by builders of the Open Read more…

  4. You can’t go wrong watching JavaScript talks

    • by • Firefox, JavaScript, Video • 3 comments

    Late last week, I was collecting suggestions for year-end Hacks blog posts. As she headed out for the winter holidays, apps engineer Soledad Penadés gifted me “a bunch of cool talks I watched this year.” In fact, it’s a curated collection of presentations from JSConf, Read more…

  5. Pseudo elements, promise inspection, raw headers, and much more – Firefox Developer Edition 36

    • by • CSS, Developer Tools, Featured Article, Firefox, HTML5, JavaScript • 3 comments

    Firefox 36 was just uplifted to the Developer Edition channel, so let’s take a look at the most important Developer Tools changes in this release. We will also cover some changes from Firefox 35 since it was released shortly before the initial Developer Edition announcement. Read more…

  6. Mozilla Introduces the First Browser Built For Developers: Firefox Developer Edition

    • by • Debugging, Developer Tools, Featured Article, Firefox, Firefox Development Highlights, Firefox OS • 115 comments

    Developers are critical to the continued success of the Web. The content and apps they create compel us to come back to the Web every day, whether on a computer or mobile phone. In celebration of the 10th anniversary of Firefox, we’re excited to unveil Read more…

  7. Generational Garbage Collection in Firefox

    • by • Firefox, JavaScript, Performance • 14 comments

    Generational garbage collection (GGC) has now been enabled in the SpiderMonkey JavaScript engine in Firefox 32. GGC is a performance optimization only, and should have no observable effects on script behavior. So what is it? What does it do? GGC is a way for the Read more…

  8. Building Firefox Hub Add-ons for Firefox for Android

    • by and • Firefox, Mobile • 4 comments

    The Firefox Hub APIs allow add-ons to add new panels to the Firefox for Android home page, where users normally find their top sites, bookmarks and history. These APIs were introduced in Firefox 30, but there are more features and bug fixes in Firefox 31 Read more…

  9. Firefox OS Apps run on Android

    • by and • Apps, Firefox, Mozilla • 18 comments

    At Mozilla we believe that apps and browsing are best viewed as cooperative and symbiotic, each better when working together. We are working to strengthen that relationship by building an apps ecosystem that is built using the Web technologies that so many developers are already Read more…

  10. Creating a Multiplayer Game with TogetherJS and CreateJS

    • by and • Animations, Firefox, HTML5, JavaScript • 16 comments

    Bubble Hell Duel is a multiplayer HTML5 dogfighting game. The object of the game is to dodge bubbles launched from your opponent while returning fire. This game was written mainly as a prototype for learning and the source code is available on GitHub. You can Read more…