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Offline-First Landscape – 2025
Building Marco meant committing to IMAP and cross-platform support. Here is why offline-first proved far harder than we expected, and what we learned.
153
An Introduction to Solid Queue for Ruby on Rails
Solid Queue is Rails’ default background job backend: jobs live in your database, no Redis. See how jobs, workers, and the supervisor work under the hood.
154
Tor Browser 15.0
Tor Browser 15.0 is now available, featuring an update to Firefox ESR 140, improvements to tab management and the address bar on desktop, and screen lock for Android.
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Migrating to React Native's new architecture
Shopify successfully migrated two of its largest apps, Shopify Mobile and Shopify Point of Sale (POS) to React Native's New Architecture while maintaining weekly releases and serving millions of merchants. This migration involved a complex codebase with hundreds of screens and native modules, extensive custom…
156
A stateful browser agent using self-healing DOM maps
Most browser agents forget what they’ve done. This one remembers, adapts, and learns, redefining how AI agents get work done.
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CheerpJ 4.1: Java in the browser, now supporting Java 17 (preview)
The latest release of our state-of-the-art Java runtime that runs completely in the browser via WebAssembly, is now available. Supports up to Java 17.
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It’s OK to block ads (2015)
Over the past couple of months, the practice of ad blocking has received heightened ethical scrutiny. (1,2,3,4) If you’re unfamiliar with the term, “ad blocking” refers to software—usually web browser plug-ins, but increasingly mobile apps—that stop most ads from appearing when you use websites or apps that would…
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Firefox 32-bit Linux Support to End in 2026
For many years, Mozilla has continued to provide Firefox for 32-bit Linux systems long after most other browsers and operating systems ended support. We made this choice because we care ...
160
Cascading Spy Sheets: Exploiting the Complexity of Modern CSS for Fingerprinting
In an attempt to combat user tracking, both privacy-aware browsers (e.g., Tor) and email applications usually disable JavaScript. This effectively closes a major angle for user fingerprinting. However, recent findings hint at the potential for privacy leakage through selected Cascading Style Sheets (CSS) features…
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Crawlers impact the operations of the Wikimedia projects
Since the beginning of 2024, the demand for the content created by the Wikimedia volunteer community – especially for the 144 million images, videos, and other files on Wikimedia Commons – has grow…
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Django 6.0 beta 1 released
Posted by Natalia Bidart on Oct. 22, 2025
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Locality of Behaviour (2020)
Carson Gross explores the Locality of Behaviour (LoB) principle, which emphasizes making the behavior of code units obvious on inspection to enhance maintainability. He discusses the tradeoffs between LoB and other software design principles like DRY and SoC, offering insights on balancing clarity, abstraction, and…
164
The hamburger-menu icon today: Is it recognizable?
Hamburger menus are a more familiar pattern today than 10 years ago, but the same old best practices for hidden navigation still apply.
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Datastar response to misunderstandings
A recent blog post titled HTMX, Datastar, greedy developer and several Hacker News threads raised concerns about Datastar Pro, pricing, and whether features were “moved behind a paywall”. Here’s what has changed, who Pro is for, and how to achieve some of the same things with the free version.
166
Chaining FFmpeg with a Browser Agent
Discover how we embedded FFmpeg inside a browser agent to process videos instantly, no servers, APIs, or uploads. Watch how it all comes together.
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How devtools map minified JS code back to your TypeScript source code
A deep dive into how JavaScript source maps work under the hood, with examples showing how all the pieces fit together.
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You don't need Next.js – Why we migrated from Next to React
Why we moved the ComfyDeploy dashboard from Next.js to React with TanStack Router and Rspack: build time fell from 3 minutes to 18 seconds.
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Design System Options for Rails
Choosing a design system and component library for Ruby on Rails applications
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Why JPEG XL ignoring bit depth is genius (and why AVIF can't pull it off)
JPEG and AVIF are locked to 8, 10 or 12 bits. JPEG XL works in float32 with the XYB color space, so bit depth stops mattering. Here’s why that helps HDR.
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Oklch in CSS: why we moved from RGB and HSL (2024)
CSS Color Module 4 adds oklch(), and we gain P3 wide-gamut support, boost code readability, and improve developer-designer communication.
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CRLite: Certificate Revocation Checking in Firefox
Firefox is now the first and the only browser to deploy fast and comprehensive certificate revocation checking that does not reveal your browsing activity to anyone (not even to Mozilla). ...
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Critical Security Vulnerability in React Server Components
The library for web and native user interfaces
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Creating a React App
The library for web and native user interfaces