1
How Firefox Got Fast Again
Over the past seven months, we’ve been rapidly replacing major parts of the engine, introducing Rust and parts of Servo to Firefox. Plus, we’ve had a browser performance strike force ...
Mozilla Hacks
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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
Firefox 70
Firefox 70 is released today, and includes great new features such as secure password generation with Lockwise and the new Firefox Privacy Protection Report, as well as cool additions for ...
3
Firefox 66 to block automatically playing audible video and audio
Unsolicited volume can be a great source of distraction and frustration for users of the web. So we are making changes to how Firefox handles playing media with sound and ...
4
Hello Chrome, it’s Firefox calling
Mozilla is excited to announce that we’ve achieved a major milestone in WebRTC development: WebRTC RTCPeerConnection interoperability between Firefox and Chrome. This effort was made possible because of the close ...
5
Firefox 64 Released
The year's last release of Firefox bundles together goodies for all, including multi-tab management in the interface, new CSS features, devtools improvements, better privacy protections, add-ons updates, and much, much ...
6
Firefox’s new streaming and tiering compiler
People call WebAssembly a game changer because it makes it possible to run code on the web faster. Some speedups are already present, and some are yet to come. With ...
7
Calls between JavaScript and WebAssembly are finally fast
At Mozilla, we want WebAssembly to be as fast as it can be. This started with its design, which gives it great throughput. Then we improved load times with a ...
8
The web at maximum FPS: How WebRender gets rid of jank
The Firefox Quantum release is getting close. It brings many performance improvements, including the super fast CSS engine that we brought over from Servo. But there’s another big piece of ...
9
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. ...
10
Improving Firefox Responsiveness on macOS
If you're running Firefox on macOS you might have noticed that its responsiveness has improved significantly in version 103.
11
Shipping Rust code in Firefox
TL;DR: Starting with Firefox 48, Mozilla is shipping its first production Rust code, with more to come! Mozilla ❤ Rust It's hard to believe it's been almost seven years since ...
12
The Baseline Interpreter: A Faster JavaScript Interpreter in Firefox 70
Modern web applications load and execute a lot more JavaScript code than they did just a few years ago. While JIT (just-in-time) compilers have been very successful in making JavaScript ...
13
Making WebAssembly a first-class language on the Web
This post is an expanded version of a presentation I gave at the recent WebAssembly CG meeting in Munich. WebAssembly has come a long way since its first release in 2017. The 1.0 version of WebAssembly was already a great fit for low-level languages like C and C++, and immediately enabled many new kinds of…
14
Inside a fast CSS engine
Project Quantum is a major rewrite of Firefox’s internals to make Firefox fast. We’re swapping in parts from our experimental browser, Servo, and making massive improvements to other parts of ...
15
Puppeteer Support for Firefox
Puppeteer 23 now supports Firefox, simplifying browser automation and testing across both Chrome and Firefox.
16
Porting Firefox to Apple Silicon
The release of Apple Silicon based Macs at the end of last year generated a flurry of news and some surprises at the machine’s performance.
17
Firefox got faster for real users in 2023
We’ve been working hard on making Firefox even faster and we’re extremely happy to report that this has resulted in an improvement in speed.
18
Firefox 73
Today we’ve released Firefox 73, with useful additions that include CSS and JavaScript updates, and numerous DevTools improvements. We’ve added to CSS logical properties, pushed performance forward in the Console ...
19
Improving Firefox stability on Linux
A year ago at Mozilla we started to improve Firefox stability on Linux. This effort quickly became an example of good synergies between FOSS.
20
MDN Plus
Today, we are launching MDN Plus, our first step to providing a personalized and more powerful experience.
21
Mozilla WebThings
Mozilla WebThings is an open platform for monitoring and controlling devices over the web.
22
Improving Firefox stability on Windows by retrying failed memory allocation
Poorly behaving web pages and apps are no longer capable of crashing the browser by exhausting memory, thanks to a simple trick.
23
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). ...
24
Rust 2018 is here, but what is it?
Starting today, the Rust 2018 edition is in its first release. With this edition, we’ve focused on making Rust developers as productive as they can be. Most of the language ...
25
Private by Design: How We Built Firefox Sync
Firefox Sync by default protects all your synced data so Mozilla can’t read it. We built Sync this way because we put user privacy first. How it works is...
26
WebAssembly’s post-MVP future
People have a misconception—they think that the WebAssembly that landed in browsers back in 2017—is the final version. In fact, we still have many use cases to unlock, from heavy-weight ...
27
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 ...
28
QUIC and HTTP/3 Support Now in Firefox Nightly and Beta
Support for QUIC and HTTP/3 is now enabled by default in Firefox Nightly and Firefox Beta. HTTP/3 will be available by the end of May.
29
A few HTML tips
A while ago I wrote an article with some CSS tips, now it’s time to give some polish to our HTML! In this article I’ll share some tips and advice ...
30
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 ...