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  1. From Map/Reduce to JavaScript Functional Programming

    Since ECMAScript 5.1, Array.prototype.map & Array.prototype.reduce were introduced to major browsers. These two functions not only allow developers to describe a computation more clearly, but also to simplify the work of writing loops for traversing an array; especially when the looping code actually is for Read more…

  2. Project Silk

    Editor’s Note: An earlier version of this post appeared on Mason Chang’s personal blog. For the past few months, I’ve been working on Project Silk which improves smoothness across the browser. Very much like Project Butter for Android, part of it is finally live on Read more…

  3. The P2P Web: Wi-Fi Direct in Firefox OS

    At Mozilla, we foresee that the future of the Web lies in its ability to connect people directly with multiple devices, without using the Internet. Many different technologies exist and are already implemented to allow peer-to-peer connections. Today is the first in a series of Read more…

  4. Canvas 2D: New docs, Path2D objects, hit regions

    Over the last year, a couple of new HTML Canvas 2D features were implemented in Firefox and other recent browsers, with the help of the Adobe Web platform team. Over on MDN, the documentation for Canvas 2D got a major update to reflect the current Read more…

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

    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…

  6. 2014: Mozilla Hacks looks back

    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…

  7. You can’t go wrong watching JavaScript talks

    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…

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

    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…

  9. Mozilla and Web Components: Update

    Editor’s note: Mozilla has a long history of participating in standards development. The post below shows a real-time slice of how standards are debated and adopted. The goal is to update developers who are most affected by implementation decisions we make in Firefox. We are Read more…

  10. Introducing the JavaScript Internationalization API

    Firefox 29 issued half a year ago, so this post is long overdue. Nevertheless I wanted to pause for a second to discuss the Internationalization API first shipped on desktop in that release (and passing all tests!). Norbert Lindenberg wrote most of the implementation, and Read more…

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