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TTFB doesn't mean what you think it means
Robin Marx is a Web Performance Architect at Akamai Technologies. His main expertise is in network protocol performance, including HTTP/3 and QUIC, which was the topic of his PhD research. In a previous life he was a multiplayer game programmer and co-founder of LuGus Studios. YouTube videos of Robin are either humoristic technical talks or him hitting other people with longswords. Time-To-First-B
Making complex web apps faster
On the web, speed is everything. The responsiveness of your browser, the time it takes for a web app to appear, and how quickly that app handles user interactions all directly impact your experience as a web user. At Microsoft, we care deeply about improving web performance, and we’re making progress on it from several directions: Within the browser itself, by making Edge faster and more responsiv
Announcing Baseline in action  | Blog  | web.dev
Published: December 2, 2025 Here in Chrome Developer Relations, we've been talking a lot about Baseline these days, from the arrival of new web interoperable features all the way to the tooling that's implementing Baseline. However, we've not spent much time showing you how these features can all come together to help you build modern user experiences on the web without worrying about browser comp
Your URL Is Your State
Couple of weeks ago when I was publishing The Hidden Cost of URL Design I needed to add SQL syntax highlighting. I headed to PrismJS website trying to remember if it should be added as a plugin or what. I was overwhelmed with the amount of options in the download page so I headed back to my code. I checked the file for PrismJS and at the top of the file, I found a comment containing a URL: /* http
Tachi Code
Tachi Code automatically detects source files in your browser and opens them in a powerful code editor. Whether you’re viewing an API response, source code on GitHub, or any other source file, Tachi Code transforms your browser tab into a fully functional code editor. Tachi Code uses the Monaco Editor, the same editor that powers Visual Studio Code, to provide a rich editing experience with LSP su
Browserslist now supports Baseline  | Blog  | web.dev
Published: September 16, 2025 Browserslist is a utility that tells build toolchains how to modify source code for a specified set of browsers. Browserslist relies on a query syntax that specifies exact versions of browsers, relative queries such as last 2 years, and even usage-based queries like > 0.5%. It's used by other popular tools such as Babel and PostCSS. Chances are, if you use any kind of
How modern browsers work
Note: For those eager to dive deep into how browsers work, an excellent resource is Browser Engineering by Pavel Panchekha and Chris Harrelson (available at browser.engineering). Please do check it out. This article is an overview of how browsers work. Web developers often treat the browser as a black box that magically transforms HTML, CSS, and JavaScript into interactive web applications. In tru
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DOM-based Extension Clickjacking: Your Password Manager Data at Risk
DOM-based Extension Clickjacking: Your Password Manager Data at Risk 9 August 2025 (Updated: 11 September 2025) This security research was presented at DEF CON 33: PDF presentation Since the research was presented at DEFCON (August 9, 2025), several updates have been made: Update 22.8.2025: Bitwarden: 2025.8.1 in progress, <=2025.8.0 vulnerable Enpass: 6.11.6 fixed - released: 13.8.2025, <=6.11.5
Designing the Built-in AI Web APIs
For the last year, I’ve been working as part of the Chrome built-in AI team on a set of APIs to bring various AI models to the web browser. As with all APIs we ship, our goal is to make these APIs compelling enough that other browsers adopt them, and they become part of the web’s standard library. Working in such a fast-moving space brings tension with the usual process for building web APIs. When
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A brief history of JavaScript | Deno
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Default styles for h1 elements are changing | MDN Blog
Browsers are starting to roll out changes in default UA styles for nested section headings. Developers should check that their sites don't rely on UA styles for certain cases to avoid unexpected results and failing Lighthouse checks. In this post, we'll have a look at what the incoming changes are, how to identify if it's an issue on your pages, and some hints for conformant and better-structured
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Third Parties and Single Points of Failure
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WebStatus.dev: Now with more data, deeper insights, and a clearer path to Baseline  | Blog  | web.dev
GitHub - lightpanda-io/browser: Lightpanda: the headless browser designed for AI and automation
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