The official Chrome Devs X account from Google. We want to help you build beautiful, accessible, fast, & secure websites that work for everyone, everywhere.
Mountain View, CA
Joined February 2010
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That failing API call in the Network panel? Rewrite it in the Console in two clicks → goo.gle/4i2xbRL
Right-click any request and select "Edit and resend as fetch". DevTools opens the Console with the fetch() call ready to edit, parameter comments included, and a reference link.
🔒 Also new: local overrides block path traversal and non-http(s) schemes like data: and blob:
Chrome for Developers retweeted
I got a few questions recently about contributing to our open-source WebMCP projects, so here are some example starting points to help you jump in. 💪
If you want to chat about your ideas first, feel free to DM me anytime! 😀
Tools: goo.gle/webmcp-tools
Extension: goo.gle/webmcp-extension
Chrome 155 adds support for JPEG XL (.jxl) → goo.gle/4yYpSjW
Expect 30-50% smaller file sizes than traditional JPEGs, native HDR, progressive rendering, and lossless JPEG transcoding.
Under the hood, Chrome uses jxl-rs, a pure Rust decoder built for maximum memory safety and performance.
🔒 Prevent unauthorized data exfiltration with connection allowlists → goo.gle/4y7rYgp
Third-party scripts or AI-generated code can bypass app-level checks to send sensitive information to unauthorized servers. Connection allowlists give you explicit control over network requests by making the browser the gatekeeper of all network connections originating from your page.
Chrome for Developers retweeted
We have presents for you! 🎁
- A new WebMCP Skill with best practices for security, development, & consequential flows
- WebMCP Types: TypeScript definitions, with type inference from InputSchema
Give em to your agent, it helps scaffold out WebMCP so fresh and so clean clean
ALT A sheet that talks about three tools for webmcp: the extension, webmcp types, and webmcp-skills
Chrome for Developers retweeted
Experimental soft navigation data now available in CrUX!!
If your site is an SPA then see how your own Core Web Vitals data will change at: cruxvis.withgoogle.com/
And read this blog post for more details about how Core Web Vitals change in general:
web.dev/blog/crux-experiment…
Install two key updates to modernize extension builds with @antigravity:
1️⃣ Modern Web Guidance to share best practices directly with your coding agent
2️⃣ Chrome DevTools for agents, which allows your agent to install and test extensions in a real Chrome browser
Write your prompt and enjoy smooth sailing for your extensions development ⛵
Check it out → goo.gle/4Ba886J
Chrome for Developers retweeted
The Agentic Web is happening live! 🔥
This week we have a special guest! 🎉 Together with @andreban we are thrilled to welcome @nartmadi , CEO and Founder of @Senro_AI 🎉
We will be discussing WebMCP Evals, Observability, and way more 😉
What does "production-ready" mean for the Agentic Web? We’re diving deep into the tooling and testing patterns you need to know.
🕒 When: Friday at 5 PM CET / 8 AM PDT
🎥 Where: Live on twitch.tv/theagenticweb/
See you there!
#TheAgenticWeb #WebMCP #Evals
Modern Web Guidance brings up-to-date coding guides directly into your agent's context window. That way, it uses HTML attributes to define dialogs declaratively, instead of messy JS event listeners → goo.gle/mwg
WebGPU in Chrome 153 and 154 brings major WGSL language upgrades → goo.gle/4hGkYAU
You can now write directly to vector swizzles like position.xy = vec2f(10.0, 20.0) with the new swizzle_assignment extension.
Also included in this release:
• WGSL buffer_view for reinterpreting buffer memory with built-in functions
• Direct mapping improvements in Dawn to eliminate extra GPU buffer copies
Chrome for Developers retweeted
Chrome DevTools for Agents is powerful. If you don't already have it in your workflow, I would strongly consider it! It's been useful for testing, and works with all my various agents
The video shows scaffolding and then testing WebMCP tooling right in one prompt:
Chrome for Developers retweeted
I'm super excited to announce that today we've added experimental versions of Core Web Vitals metrics including soft navigations to the Chrome User Experience Report!
You can see them in BigQuery, the APIs, and CrUX Vis. Check it out!
web.dev/blog/crux-experiment…
The Split View API is here! Arriving in Chrome 155 and developed in close collaboration with Mozilla and browser vendors in the WebExtensions Community Group, this API integrates directly into the browser.tabs namespace without requiring any extra manifest permissions → goo.gle/47fdSOW
📐 Embed third-party content without extraneous scrollbars → goo.gle/4jT0nvM
Chrome now offers support for frame-sizing, letting cross-site iframes grow as internal content expands. Try it out as a progressive enhancement.
Side-by-side test for building dialogs: standard agent vs. agent with Modern Web Guidance 🏁
Both generate similar UIs, but the guided version skips four separate event listeners in favor of `commandfor` and `command` attributes, with less code overall.
Which approach would you rather maintain in your codebase? → goo.gle/mwg
Chrome for Developers retweeted
A less discussed and potentially game-changing aspect of WebMCP: helpful a11y.
Assistive tech struggles with the same interfaces agents do. Dense menus, unlabeled buttons, etc.
When a site has clear tools, we can expose exactly the functionality we need.
Say goodbye to "Replay XHR" in DevTools and hello to "Resend" 👋
Instantly refire web requests while preserving all headers, cookies, and payloads. Or choose "Edit and Resend as Fetch" if you want to modify them.
Check out the full What's New in DevTools video for all the latest updates → goo.gle/4hPB1MQ