gilbertococchi

Chrome 144 introduces a new `<geolocation>`HTML Element to implement more impactful user location permission request flows.
The new element serves multiple purposes, from location sensor access request as well as providing access to location data without the need to call the Geolocation JS API.

Signal API for passkeys available on Chrome for Android  |  Blog  |  Chrome for Developers Learn how the Signal API for passkeys is now available on Chrome for Android, enabling better synchronization between relying parties and passkey providers.

Signal API is now available on Chrome for Android.

A user deletes their credential on the website, but the passkey remains in their passkey provider. The next time they try to sign in, the passkey provider offers a passkey that no longer works. A sign-in attempt will fail and this isn't ideal.

Throttle individual network requests  |  Blog  |  Chrome for Developers Use the Request conditions tab to block specific URLs or apply custom network throttling profiles to individual resources.

🎙️LET'S GET READY TO RUMBLE! It's been one of DevTool's most requested features… weighing at eiiighty-five votes… 10 years in the making… entering the ring from Chrome 144… Heeeerre's: Individual request throttling!!!

developer.chrome.com/blog/throttl...

🥊 It's a knockout! The crowd does wild! 👏🙌🎉🥳

Sorry to hear that!

Great to see Banking Apps adopting Passkeys for a passwordless and more secure future!

PS: Passkeys can be shared across web and app, making login seamless across channels (web to app or viceversa) by using the Digital Asset Link JSON!

Contribute Passionate about a topic? Working on a new tool? Have a technique you want to teach? Research you've done? Tell the web performance community! Send your articles to ssttoo@ymail.com. Please include: ...

December is here (in a few hours in my timezone), which means the Web Performance "Advent" Calendar is back for its... 17th Edition! One article a day in the month of December.

Be a part of it and contribute an article: calendar.perfplanet.com/contribute/

Oh nice, Enjoy Lanzarote!
Love that island!

Stop guessing and start debugging responsive styles automatically with Chrome DevTools MCP → goo.gle/3IPT2No

Learn how a coding agent can find a visual bug on a specific device size, analyze the source code, update the CSS, and verify the fix with a live browser screenshot.

“Added preview support for Event Timing API (Interaction to Next Paint)”

#webperf #CoreWebVitals

performance.now(); 30th and 31st of October, Amsterdam On 30th and 31st of October, 2025, the sixth edition of performance.now() will take place in Amsterdam—a single track conference, covering today’s most important web performance insights.

It's a bit of a surprise to me, but there are still tickets available for performance.now(), the most important web performance conference of the year:

perfnow.nl

I'm booking my travel, and hope to see you in Amsterdam next month!

Announcing Chrome DevTools MCP! 🚀

Connect your AI coding agent to Chrome's powerful automation & debugging capabilities with ease.

Learn more: developer.chrome.com/blog/chrome-...

Upvote this feature for Interop 2026: github.com/web-platform...

This is great news!!!
Congrats Adam!
Can't wait to hear what you will do at Shopify!

Writing WebSocket client applications - Web APIs | MDN In this guide we'll walk through the implementation of a WebSocket-based ping application. In this application, the client sends a

MDN just added a new section in the WebSocket API guide called "Working with the bfcache".

Check this out if you are using WebSocket, you may be blocking BFCache and making user experience worse!

developer.mozilla.org/en-US/docs/W...

If you thought we were done with View Transitions, guess again!

A feature Chrome is working on, is “Scoped View Transitions”, which allow you to scope a VT to a subtree of the DOM.

This unlocks things like concurrent transitions and prevents layering issues.

developer.chrome.com/blog/scoped-...

Image of a rally car that's white with some green and red details, and caption as follows: SPDY stream. Performance people and projects. Wednesday, September 10, 1 PM Eastern daylight time. Online.

This is happening today in ~3hrs. @weston.ruter.net joins me to discuss benchmarks as well as performance updates made on the #Wordpress Core platform. Join us!
✨ SPDY STREAM 009 ✨
🗣️ Westin Ruter
📆 Wednesday September 10th, 2025
⏰ 1pm EDT, 10am PDT
🔗 bit.ly/spdy-stream-...

🆕 The 202508 Chrome User Experience (CrUX) release is now live on BigQuery!

Check out the announcement post for the full info:
groups.google.com/a/chromium.o...

Highlights below 👇

🧵 1/3

Case Study: How Google created a connected experience for its new AI Mode using view transitions  |  Blog  |  Chrome for Developers Bridging the gap between MPA and SPA: Making the transition into Google Search AI Mode feel seamless and connected with cross-document view transitions.

Did you know Cross-Document View Transitions are being used in production on Google Search?

developer.chrome.com/blog/google-... is a case study I co-authored with one of our engineers from the Google Search UI team.

performance.now() is coming to Amsterdam this October!
This event is great both for the inspirational talks as well as for the opportunity to meet folks from different companies and backgrounds to discuss how to successfully tackle web performance challenges!

It's really common in Italy to find two menu sides, one with Red and White pizzas.
Having said that it depends on the ingredients.
If you have really good Ingredients, you may not need all that red industrial tomato sauce...

Very exciting news. With these changes, you can more easily build accordions such as seen in this recording.

developer.chrome.com/blog/styling...

Currently supported in Chrome and Safari, and soon Firefox!

performance.now(); 30th and 31st of October, Amsterdam On 30th and 31st of October, 2025, the sixth edition of performance.now() will take place in Amsterdam—a single track conference, covering today’s most important web performance insights.

performance.now(), the web performance conference, 30th and 31st of October, Amsterdam. Single track, the best speakers in the industry, plenty of your performance-mad peers around to have fascinating conversations. What's not to like? Let's introduce our speakers ...
perfnow.nl

The Chrome DevTools Performance panel just leveled up! 🚀 Here's a 69-second taste of the new hotness.

For some developers and/or framework authors I presume a notification could help understanding when a new feature is coming to land some experiment to send feedback and verify whether the feature suite their needs.

I think so, I personally subscribed to blink-dev because I am curious about when something starts to be available for experiment and be notified when something ships.

BFCache can hugely influence your page performance for URLs high on Back Forward Navigation types.

If you use CrUX or RUM and you see a lot of traffic in % attributed on Back Forward and few on BFCache maybe you are leaving money on the table!
CruXVis can help you measuring this opportunity!

Two lines of Cross-Document View Transitions code you can use on every website today Arguably, the most profound thing about the web is the ability to link one page to another.

The one where I muse about how this simple bit of code radically changes how the web itself seems to behave…

webkit.org/blog/16967/t...

GitHub - GoogleChrome/web-vitals: Essential metrics for a healthy site. Essential metrics for a healthy site. Contribute to GoogleChrome/web-vitals development by creating an account on GitHub.

We've just published v5.0.0 of the web-vitals JavaScript library for measuring Core Web Vitals.

github.com/GoogleChrome...

As a major release, this includes a number of breaking changes as detailed in the upgrading doc:

github.com/GoogleChrome...

Please read carefully before upgrading.

1/5 🧵

Lighthouse is moving to performance insight audits  |  Blog  |  Chrome for Developers Lighthouse is moving to performance insight audits

We're updating Lighthouse to be based on the same Insights we recently launched in the Performance panel of Chrome DevTools.

developer.chrome.com/blog/moving-...

This will help align the tools but will be a breaking change. So we'll make that change in Lighthouse 13 in 6 months.

1/3 🧵

WordPress 6.8 Field Guide This guide outlines major developer features and breaking changes in 6.8 and is published in the Release Candidate phase to help inform WordPress extending developers, Core developers, and others. …

WordPress 6.8 is out today. Including Speculation Rules in Core thanks ot some amazing work by @felixarntz.bsky.social !!
make.wordpress.org/core/2025/03...

It's a very conservative prefetch-on-mousedown default but site owners (or plugins) can customise that:
make.wordpress.org/core/2025/03...