1
Saying Goodbye to Firebug
The most popular and powerful web development tool. Firebug has been a phenomenal success. Over its 12-year lifespan, the open source tool developed a near cult following among web developers. ...
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
2
Puppeteer Support for Firefox
Puppeteer 23 now supports Firefox, simplifying browser automation and testing across both Chrome and Firefox.
3
A Classic Extension Reborn: Tree Style Tab
Yuki “Piro” Hiroshi is a trailblazer and a true do-it-yourselfer. Whenever the Tokyo-based programmer gets irritated with any aspect of his browsing experience, he builds a workaround for himself and ...
4
Introducing the Firefox debugger.html
debugger.html is a modern JavaScript debugger from Mozilla, built as a web application with React and Redux. This project was started early this year in an effort to replace the ...
5
WebIDE lands in Firefox Nightly
Editor's note: if you want to help test it on a recent nightly you can toggle the devtools.webide.enabled preference in about:config. The WebIDE is available today under Tools>Web Developer>App Manager ...
6
Firefox 41 can screenshot a single DOM element
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 ...
7
Firefox Developer Tools – Editable box model, Sublime Text keys
A new set of the Firefox Developer Tools features has just been uplifted to the Aurora channel. These features are available right now in Aurora, and will be in the ...
8
Hello wasm-pack
Introducing wasm-pack, a new tool for assembling and packaging Rust crates that target WebAssembly. These packages can be published to the npm Registry and used alongside other packages. This means ...
9
New Developer Tools Features in Firefox 34
A new set of Firefox Developer Tools features has just been uplifted to the Aurora channel. These features are available right now in Aurora, and will be in the Firefox ...
10
Firefox 54: E10S-Multi, WebExtension APIs, CSS Clip-Path
The release of Firefox 54 completes the transformation of Firefox into a fully multi-process browser, running many simultaneous content processes in addition to a UI process and, on Windows, a ...
11
Faster Smarter JavaScript Debugging in Firefox DevTools
Script debugging is one of the most powerful and complex productivity features in the web developer toolbox. Done right, it empowers developers to fix bugs quickly and efficiently. The DevTools ...
12
Introducing TogetherJS
What is TogetherJS? We'd like to introduce TogetherJS, a real-time collaboration tool out of Mozilla Labs. TogetherJS is a service you add to an existing website to add real-time collaboration ...
13
Firebug lives on in Firefox DevTools
Firebug, the original browser developer tool, has been discontinued as a separate Firefox add-on, and will go forward as Firebug.next atop Firefox DevTools. The spirit of Firebug lives on in ...
14
Iodide: An experimental Mozilla tool for data exploration on the web
Meet Iodide, an experimental open source tool to help scientists write beautiful interactive documents using web technologies, all within a browser-based iterative workflow that will be familiar to many scientists.
15
Engineering code quality in Firefox
Here's an insider's look at Firefox's code quality toolchain that's been designed to manage the ongoing development and monthly releases of our desktop browser. This post explores the architecture, challenges, ...
16
New Firefox Command Line helps you develop faster
Firefox 16, now on the Beta channel, has a fantastic feature that was mentioned briefly in the Aurora 16 blog post and first introduced in a separate post by Joe ...
17
Introducing node-firefox
NOTE: we presented this project last Sunday at FOSDEM, but not everyone could make it to Brussels, so here's a post explaining what node-firefox is and how can it help ...
18
Firefox Add-on Enables Web Development Across Browsers and Devices
Developing across multiple browsers and devices is the main issue developers have when building applications. Wouldn’t it be great to debug your app across desktop, Android and iOS with one ...
19
Tilt: Visualize your web page's DOM in 3D
Tilt is a Firefox extension that lets you visualize any web page DOM tree in 3D. It is being developed by Victor Porof (3D developer responsible with the Firefox extension ...
20
Firefox’s New Memory Tool
Firefox Developer Edition 44, released last week, includes a brand new memory tool to help you understand how your web applications are using and retaining memory. This is especially useful ...
21
Firefox – tons of tools for web developers
One of the goals of Firefox have always been to make the lives of web developers as easy and productive as possible, by providing tools and a very extensible web ...
22
How MDN's Autocomplete Search Works
Autocomplete search added to MDN Web Docs allows you to quickly jump to the document you're looking for by typing parts of the document title
23
Oxidizing Source Maps with Rust and WebAssembly
A detailed look at how we replaced the most performance-sensitive portions of the source-map JavaScript Library’s source map parser with Rust code that is compiled to WebAssembly. The results: The ...
24
Introducing Rec Room
It's no secret that the best frameworks and tools are extracted, not created out of thin air. Since launching Firefox OS, Mozilla has been approached by countless app developers and ...
25
Firefox 53: Quantum Compositor, Compact Themes, CSS Masks
Firefox 53 includes the first significant piece of Project Quantum, the Quantum Compositor for Windows. Dig in to features and under-the-hood improvements such as compact themes, new WebExtension features, the ...
26
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 ...
27
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 ...
28
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 ...
29
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 ...
30
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 ...