91
Containers Come to Firefox Test Pilot
The Containers feature in Firefox Nightly gives users the ability to place barriers on the flow of data across sites by isolating cookies, indexedDB, localStorage, and caches within discrete browsing ...
Mozilla Hacks
Mozilla Hacks is written for web developers, designers and everyone who builds for the Web. Hacks is produced by Mozilla's Developer Relations team and features hundreds of posts from Mozilla ...
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Visit hacks.mozilla.org → RSS feedOn Hacker News May 2010 – May 2026
Web & Frontend 170Software Engineering 69Tools & Productivity 44Systems & Performance 35Tech Industry & Business 31Security & Privacy 19
92
Mozilla and Open Web Docs Working Together on MDN
With the upcoming launch of MDN Plus, we believe it’s a good time to talk about how our two organizations work together.
93
Introducing the Web Audio Editor in Firefox Developer Tools
In Firefox 32, the Web Audio Editor joins the Shader Editor and Canvas Debugger in Firefox Developer Tools for debugging media-rich content on the web. When developing HTML5 games or ...
94
Firefox Network Monitor Reloaded – Part 1
The Network Monitor tool has been available in Firefox since the earliest days of Firefox Dev Tools. It’s an invaluable tool for anyone who cares about page load performance and ...
95
Sneak Peek at WebAssembly Studio
WebAssembly.Studio is an online IDE (integrated development environment) that helps you learn and teach others. It’s also a Swiss Army knife that comes in handy whenever working with WebAssembly (WASM). ...
96
Firefox Hardware Report for Web Developers
Suppose you're developing a sophisticated web game or application, and you're wondering — will it actually be able to run? What hardware should I be targeting to get the widest ...
97
CSS Variables in Firefox Nightly
As reported by Cameron McCormack, Firefox Nightly (version 29) now supports CSS variables. You can get a quick overview in this short screencast: You can define variables in a ...
98
Firefox Developer Edition 38: 64-bits and more
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 ...
99
Firebug 1.12 – New Features
Firebug team released fresh new Firebug 1.12 and here is a list of some new features we have implemented in this version. Firebug 1.12 is compatible with Firefox ...
100
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 ...
101
Live editing WebGL shaders with Firefox Developer Tools
If you’ve seen Epic Games’ HTML5 port of ‘Epic Citadel’, you have no doubt been impressed by the amazing performance and level of detail. A lot of the code that ...
102
Implementing form filling and accessibility in the Firefox PDF viewer
We decided it was time to reinvest in the PDF viewer (PDF.js) and support filling PDF forms within Firefox to make our users' lives easier.
103
Let’s Write a Firefox Web Extension
You might have heard about Mozilla's WebExtensions, our implementation of a new browser extension API for writing multiprocess-compatible add-ons. Maybe you've been wondering what it was about, and how you ...
104
The Power of Web Components
Web Components comprises a set of standards that enable user-defined HTML elements. These elements can go in all the same places as traditional HTML. Despite the long standardization process, the ...
105
Multi-Value All the Wasm
Multi-value is a proposed extension to core WebAssembly that enables functions to return many values, among other things. It is also a prerequisite for Wasm interface types. Nick Fitzgerald has ...
106
It’s Opus, it rocks and now it’s an audio codec standard
In a great victory for open standards, the Internet Engineering Task Force (IETF) has just standardized Opus as RFC 6716. Opus is the first state of the art, free audio ...
107
Flash-Free Clipboard for the Web
As part of our effort to grow the Web platform and make it accessible to new devices, we are trying to reduce the Web's dependence on Flash. As part of ...
108
AV1 and the Video Wars of 2027
This post imagines a dystopian future where only the rich can stream video to their homes, and the democratizing forces of the internet have crumbled under corruption and greed. The ...
109
Firefox Beta 15 supports the new Opus audio format
Firefox 15 (now in the Beta channel) supports the Opus audio format, via the Opus reference implementation. What is it? Opus is a completely free audio format that was recently ...
110
Version 100 in Chrome and Firefox
Chrome and Firefox will reach version 100 in a couple of months. Let's work together on fixing User Agent detection issues.
111
Firefox OS – video presentations and slides on the OS, WebAPIs
In August, Mozilla's Director of Research Andreas Gal, and one of the lead engineers for Firefox OS, Philipp von Weitershausen, gave a couple of presentations in Brazil about Firefox OS. ...
112
Firefox 56: Last Stop Before Quantum
Here at Mozilla, we’re extremely excited about next month’s release of Firefox Quantum, with massive speed improvements, a brand new UI, and many Developer Tools upgrades -- available now in ...
113
Firefox 49 fixes sites designed with WebKit in mind, and more
Several recent articles on the Hacks blog explain why web developers should care about cross-browser compatibility and how great web developers achieve it. Web developers have a critical role in ...
114
Firefox OS 2.5 Developer Preview, an Experimental Android App
Today we have made Firefox OS 2.5 available worldwide. We are also making an early, experimental build of the OS -- Firefox OS 2.5 Developer Preview -- available for developers ...
115
The Constrained Directional Enhancement Filter in AV1
AV1 is a new general-purpose video codec developed by the Alliance for Open Media. The alliance began development of the new codec using Google’s VPX codecs, Cisco’s Thor codec, and ...
116
Firefox 6 for web developers
Download Firefox 6 What's new in Firefox 6? The most notable addition to this new release are the <progress> element, touch events, Server-Sent Events as well as the return of ...
117
Mozilla announces Open Web Docs
We’re happy and proud to announce Open Web Docs, to support a community of technical writers that is open and inclusive for all.
118
Building the DOM faster: speculative parsing, async, defer and preload
In 2017, the toolbox for making sure your web page loads fast includes everything from minification and asset optimization to caching, CDNs, code splitting and tree shaking. Understanding what goes ...
119
Firefox Developer Tools and Firebug
If you haven't tried the Firefox Developer Tools in the last 6 months, you owe it to yourself to take another look. Grab the latest Aurora browser, and start up ...
120
Firefox 6 - WebSockets are back
What's new in Aurora 6? The most notable addition to this new Aurora are the <progress> element, window.matchMedia API, better APIs for binary data, Server-Sent Events as well as the ...