Improving Cross-Browser Testing, Part 1: Web Application Testing Today – Mozilla Hacks - the Web developer blog
Improving Cross-Browser Testing, Part 1: Web Application Testing Today Testing web applications can be a challenge. Unlike most other kinds of software, they run across a multitude of platforms and devices. They have to be robust regardless of form factor or choice of browser. We know this is a problem developers feel: when the MDN Developer Needs Assessment asked web developers for their top pain
Improving Firefox stability with this one weird trick – Mozilla Hacks - the Web developer blog
The first computer I owned shipped with 128 KiB of RAM and to this day I’m still jarred by the idea that applications can run out of memory given that even 15-year-old machines often shipped with 4 GiB of memory. And yet it’s one of the most common causes of instability experienced by users and in the case of Firefox the biggest source of crashes on Windows. As such, at Mozilla, we spend significa
The JavaScript Specification has a New License – Mozilla Hacks - the Web developer blog
Ecma International recently approved the 2022 standard of ECMAScript. There is something new in this edition that hasn’t been part of prior editions, but this isn’t a new programming feature. In March of this year, Ecma International accepted a proposal led by Mozilla for a new alternative license. On June 22nd, the first requests to adopt this license were granted to TC39 and applied to the follo
Everything Is Broken: Shipping rust-minidump at Mozilla – Part 1 – Mozilla Hacks - the Web developer blog
Everything Is Broken: Shipping rust-minidump at Mozilla – Part 1 For the last year I’ve been leading the development of rust-minidump, a pure-Rust replacement for the minidump-processing half of google-breakpad. Well actually in some sense I finished that work, because Mozilla already deployed it as the crash processing backend for Firefox 6 months ago, it runs in half the time, and seems to be mo
A new year, a new MDN – Mozilla Hacks - the Web developer blog
If you’ve accessed the MDN website today, you probably noticed that it looks quite different. We hope it’s a good different. Let us explain! MDN has undergone many changes in its sixteen-year history from its early beginning as a wiki to the recent migration of a static site backed by GitHub. During that time MDN grew organically, with over 45,000 contributors and numerous developers and designers
WebAssembly and Back Again: Fine-Grained Sandboxing in Firefox 95 – Mozilla Hacks - the Web developer blog
WebAssembly and Back Again: Fine-Grained Sandboxing in Firefox 95 In Firefox 95, we’re shipping a novel sandboxing technology called RLBox — developed in collaboration with researchers at the University of California San Diego and the University of Texas — that makes it easy and efficient to isolate subcomponents to make the browser more secure. This technology opens up new opportunities beyond wh
How MDN’s autocomplete search works – Mozilla Hacks - the Web developer blog
Last month, Gregor Weber and I added an autocomplete search to MDN Web Docs, that allows you to quickly jump straight to the document you’re looking for by typing parts of the document title. This is the story about how that’s implemented. If you stick around to the end, I’ll share an “easter egg” feature that, once you’ve learned it, will make you look really cool at dinner parties. Or, perhaps y
CSS Scroll Snap Updated in Firefox 68 – Mozilla Hacks - the Web developer blog
When Firefox 68 goes to general release next month, it will ship with an updated CSS Scroll Snap specification. This means that Firefox will support the same version of the specification as Chrome and Safari. Scroll snapping will work in the same way across all browsers that implement it. In this post, I’ll give you a quick rundown of what scroll snapping is. I will also explain why we had a situa
JavaScript to Rust and Back Again: A wasm-bindgen Tale – Mozilla Hacks - the Web developer blog
Recently we’ve seen how WebAssembly is incredibly fast to compile, speeding up JS libraries, and generating even smaller binaries. We’ve even got a high-level plan for better interoperability between the Rust and JavaScript communities, as well as other web programming languages. As alluded to in that previous post, I’d like to dive into more detail about a specific component, wasm-bindgen. Today
Oxidizing Source Maps with Rust and WebAssembly – Mozilla Hacks - the Web developer blog
Edit: Further algorithmic improvements yielded additional speedups over what is described here, for total speedups of up to 10.9x faster than the original implementation. Read about these extra gains in Speed Without Wizardry! Tom Tromey and I have replaced the most performance-sensitive portions of the source-map JavaScript Library’s source map parser with Rust code that is compiled to WebAssembl
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