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  1. Trainspotting: Firefox 39

    Trainspotting is a series of articles highlighting features in the lastest version of Firefox. A new version of Firefox is shipped every six weeks – we at Mozilla call this pattern “release trains.” A new version of Firefox is here, and with it come some Read more…

  2. Performance Testing Firefox OS With Raptor

    When we talk about performance for the Web, a number of familiar questions may come to mind: Why does this page take so long to load? How can I optimize my JavaScript to be faster? If I make some changes to this code, will that Read more…

  3. ES6 In Depth: Collections

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Earlier this week, the ES6 specification, officially titled ECMA-262, 6th Edition, ECMAScript 2015 Language Specification, cleared the final Read more…

  4. ES6 In Depth: Using ES6 today with Babel and Broccoli

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. ES6 is here, and people are already talking about ES7, what the future holds, and what shiny features Read more…

  5. ES6 In Depth: Symbols

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. What are ES6 symbols? Symbols are not logos. They’re not little pictures you can use in your code. Read more…

  6. Build an HTML5 game—and distribute it

    Last year, Mozilla and Humble Bundle brought great indie titles like FTL: Faster Than Light, Voxatron, and others to the Web through the Humble Mozilla Bundle promotion.  This year we plan to go even bigger with developments in JavaScript such as support for SIMD and Read more…

  7. The state of Web Components

    Web Components have been on developers’ radars for quite some time now. They were first introduced by Alex Russell at Fronteers Conference 2011. The concept shook the community up and became the topic of many future talks and discussions. In 2013 a Web Components-based framework Read more…

  8. ES6 In Depth: Arrow functions

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Arrows have been part of JavaScript from the very beginning. The first JavaScript tutorials advised wrapping inline scripts Read more…

  9. Firefox multistream and renegotiation for Jitsi Videobridge

    Firefox multistream and renegotiation for Jitsi Videobridge Author’s note: Firefox landed support for multistream and renegotiation support in Firefox 38. This article talks about how the team at Jitsi Videobridge, a WebRTC service, collaborated with the Firefox WebRTC team to get Jitsi’s multi-party video conferencing Read more…

  10. New Performance Tools in Firefox Developer Edition 40

    Today Mozilla is pleased to announce the availability of Firefox Developer Edition 40 (DE 40) featuring all-new performance tools! In this post we will cover some of DE 40’s new developer tools, fixes, and improvements made to existing tools. In addition, a couple of videos Read more…