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  • 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 showcase some of these features. ...

  • Power Surge – optimize the JavaScript in this HTML5 game using Firefox Developer Edition

    The Firefox Developer Tools team wanted to find a fun way to show off the great performance tools we’ve just added to the Firefox Developer Edition browser. We partnered with Przemysław Sikorski (aka rezoner) author of Playground.js and the arcade puzzle game QbQbQb, to create “Power Surge,” a fun game ...

  • ES6 In Depth: Destructuring

    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. Editor’s note: An earlier version of today’s post, by Firefox Developer Tools engineer Nick Fitzgerald, originally appeared on Nick’s blog as Destructuring Assignment ...

  • Creating a mobile app from a simple HTML site: Part 4

    How to polish your app and prepare it for market In previous sections of this step-by-step series (Part 1, Part 2, and Part 3) we’ve created an app that loads multiple school plans from the server. What we have so far is functional, but still has a number of issues, ...

  • ES6 In Depth: Rest parameters and defaults

    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. Today’s post is about two features that make JavaScript’s function syntax more expressive: rest parameters and parameter defaults. Rest parameters A common need ...

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