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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Chrome for Developers retweeted
Had a great time talking about the future of Chrome with @conorgrennan on the AI Applied podcast. A few of the topics we covered:
- Why AI isn't going to do everything for us
- How different users with different needs will use AI
- Why the browser presents cool opportunities for collaborating with AI
Check it out: youtube.com/watch?v=U27l2u6P…
No, WebMCP isn't replacing MCP.
MCP connects agents to your services.
WebMCP connects agents to your website while it's open and the user's in the loop.
Here's how they fit together ⤵️
Ever hovered over a button, switched to DevTools, and watched its :hover styles vanish? 🎨
Turn on inactive styles in Settings, and the Elements panel will keep showing rules that no longer apply, clearly marked with an inactive indicator → goo.gle/4i2xbRL
Clicking a link in a single-page app doesn't trigger a full page load. That's why it's tricky to measure.
Chrome DevTools now analyzes these soft navigations in Performance Insights, alongside Live Metrics and trace views → goo.gle/4i2xbRL
Now you can render live, accessible HTML buttons inside a 3D scene without losing screen reader support 🤯
The HTML-in-Canvas API makes it possible! No more floating CSS overlay hacks or laggy transform listeners. Natalia breaks down how to use the API to keep performance high and accessibility intact.
Ready to level up your canvas renders? ⬇️ goo.gle/4dV0Km1
If ads are slowing down your site, DevTools can now identify the scripts responsible → goo.gle/4i2xbRL
In Chrome DevTools, open Application > Ads to check experimental CrUX ad metrics (including CPU and Network usage), browse a table of ad scripts, and highlight every ad on the page.
Your prompt: "Add a modal that smoothly slides into view and fades out when closed."
Unguided coding agent: Custom <div>, z-index: 9999, and JS setTimeout unmount hacks.
Guided coding agent: Native <dialog> with @ starting-style, overlay, and allow-discrete transitions.
Bring current best practices to your agent workflow with Modern Web Guidance → goo.gle/mwg
Important updates for the Email Verification origin trial, including a new dedicated docs section → goo.gle/4s5Y2Qb
📱 Chrome for Android support enabled (Settings > Addresses and more > Verified Email)
🔑 Third-party origin trial support for embedded identity SDKs (same-site issuer requirement)
🛡️ JWKS signature validation guidance for optional `kid` claims
🔤 Strict exact-case email claim matching coming in Chrome 156
🏷️ Header standardized to 'Sec-Fetch-Dest: email-verification'
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