🎙️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! 👏🙌🎉🥳

Safari 26.2 is here with 65 features + 165 bug fixes — including field-sizing, Navigation API, Largest Contentful Paint, command & commandfor, CHIPS opt-in partitioned cookies, scrollend event, random(), WebGPU in WebXR, scrollbar-color, hidden=until-found and much more! webkit.org/blog/17640/w...

✨ Exciting proposal alert: the CPU Performance API. This proposal will add `navigator.cpuPerformance`, a value that measures the broad performance capability of the CPU. That way, we can scale up/down our animations to make sure everyone has the best experience possible for their device. 😄

This is just like...really rubbish right? It's horrible to watch and especially if you look at the movement of the people and objects, and the details.

🎉 And we're live! 🎉 We just launched CSS Wrapped 2025: our annual recap of all things CSS & web UI that landed in Chrome over the course of the year. 🚀 This is a big one! We highlighted 22 new features to help you build better on the web. Check out: chrome.dev/css-wrapped-2025

It's happening. We're OTing Web Install and looking for as much feedback as we can. Feel free to get in touch and open issues and let us know what you think about this advanced capability. blogs.windows.com/msedgedev/20... www.youtube.com/watch?v=WmFY...

We just published the first episode in a new series, "Developer Mode", on the Chrome for Developers YouTube channel: www.youtube.com/watch?v=Wkhl... I'm really excited about this one. We're experimenting with the style and trying to focus more on developer questions.

GDE @henrylim96.bsky.social talks about web performance at #DevFest Birmingham 2025 - @tunetheweb.com would be proud!

It is @oliverdunk.com!🔥 Oliver is talking about how you can build web extension (Side Panel API, Built-in AI) at #DevFest Birmingham 2025. @developer.chrome.com

When I realized I had free will, I asked the cabin crew for a cockpit visit ✨

Aye or Nay? `<input type=emoji>` to trigger the native emoji-picker, allowing you to pick a single emoji.

Love this! CSS @starting-style debugging is available in Chrome DevTools by @bram.us www.bram.us/2025/10/21/c...

TIL that `dns-prefetch` is now baseline "newly available". I've been using this for ages, but apparently, it only started working in iOS Safari with version 26. Here are the release notes: webkit.org/blog/17333/w...

Chrome Canary now supports network throttling for individual request URLs! Learn how to try out this new feature: www.debugbear.com/blog/chrome-...

✨ One line of CSS. Smooth page transitions. No JavaScript. ``` @view-transition { navigation: auto; } ``` The 🆕 CSS View Transitions bring native animations to multi-page apps, no SPA setup needed! Explore now 👇 developer.mozilla.org/en-US/blog/...

“Simple to use, progressive enhancement, built in APIs are the best” A timeless quote from @barrypollard.bsky.social at #perfnow, (given with a deliciously timely self-reference) I love this.

Neat lil learning from today’s @perfnow.nl (via Umar Hansa): You can now throttle individual requests in Chrome! Neat for experimenting with stuff like - lazy-loading: does the UI look okay if this chunk takes MUCH longer to arrive - resilience: what happens if this specific CDN is extremely slow

Ending spooky season with one of the spookiest images I've created.

this is going to be so useful when it finally lands in node 24 and we can make the same router run front/backend cleanly. combined with view transitions? c'mon! web.dev/blog/baselin... (ht @ash.pink for sharing)

Hey there peeps! Wanna join our team? Check this out!!👇

Please, please don't use `font-display: swap` with icon fonts. I mean, as a rule, don't use icon fonts — SVGs are so much better — but if you must, then don't use `swap`. It doesn't make sense to see random fallback letters for icons. Do me a favour and check your site now if using icon fonts.

📝 Importing vs fetching JSON JSON imports are now supported cross-browser, but when would you use them rather than fetch()? jakearchibald.com/2025/importi...

Vitest 4 is out! - Browser Mode is Stable - Visual Regression Testing - Improved Debugging - Pool Stabilization - New APIs - Bug Fixes Stay updated with our blog post: vitest.dev/blog/vitest-4

Match URLs with a powerful, standardized syntax using the URL Pattern API → goo.gle/47iTr3o Now part of Baseline, this API provides a built-in way to create URL pattern matchers that can be used against URLs or individual URL components.

The latest episode of What's New in DevTools covers Baseline integration, AI assistance, Save-Data header emulation, and more → goo.gle/4odg8NL Watch the full recap of updates from Chrome 139-141 to see these powerful new features in action and improve your debugging workflow.

As an experiment, we (the Firefox team) wanted to try a new way to get feedback on which Interop proposals matter most. So, here's a web app where you can rank the proposals you care about, giving us data we can use when reviewing which ones to champion. interop-rank.jakearchibald.com

WOW! That's so incredibly useful!

We just added @csswizardry.com to our Web Performance Heroes starter pack! (Yes, it's a bit late, but better late than never.) Every month, we honour a new hero and add them to this list. Follow along and meet the folks without whom the web would be a sadder and slower place. go.bsky.app/FTbRtFk

I mentioned before that we’re switching Lighthouse Performance audits to the new and improved Insights. The same Insights that you can see in DevTools Performance panel traces. That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!

For organising Fronteers Darkmode we had a tiny budget. In fact no budget at all for AV. But thanks to an ATEM Mini Pro and a very long USB-C cable we managed to make it look like a high-budget conference instead of a meetup. nielsleenheer.com/articles/202...

Announcing our public preview of Chrome DevTools MCP! Experience the full power of DevTools in your AI coding agent→ goo.gle/4pDE6Tk With Chrome DevTools MCP, your AI agent can run performance traces, inspect the DOM, & perform real-time debugging of your web pages.

🚀The new CSS sibling-index() and sibling-count() functions let us create staggered animations, dynamic color palettes, and even complex circular layouts with ease. I wrote about my first experiments with these fantastic new CSS additions. So much fun! ♥️ ✨ #CSS utilitybend.com/blog/styling...

the best part of @smashingconf.com (?)

Bye Bye CrUX Dashboard, I'll always be nostalgic for your stacked bars of Goodness: developer.chrome.com/blog/crux-da... You can use tamethebots.com/tools/cwv-hi..., the cruxvis.withgoogle.com or one of the many other great free tools that use the CrUX History API.

Thanks for coming to my talk at @smashingconf.com, everyone! It was a joy and an honour to be invited – and I hope it was valuable! 🤗💚 Here are the slides: noti.st/matthiasott/... #smashingconf

@ohhelloana.blog can u make this a sticker? 🥺 this summarizes perfectly the conversation between my PM and me (and i am the one saying but i want to lol) 🫣

This is slick. “Liquid Glass in the Browser: Refraction with CSS and SVG” kube.io/blog/liquid-...

Should you go for “my” or “your” when labeling items in interfaces? In summary: Use “your” when communicating to the user. Use “my” when the user is communicating to you. "Your” vs “My” in user interfaces (5min) By Adam Silver: adamsilver.io/blog/your-vs...

Good morning @smashingconf.com 🌞🐥

Kicking of @smashingconf.com Freiburg 2025. @bradfrost.com opening this year's conference. #balloons #event #conference #atomicdesign

Crashing out at how poorly npm (Microsoft) is handling this security incident. Eleventy is not affected any more but *lots* of other tools in the JavaScript ecosystem are! Hours later and the compromised package versions are still public… Maybe don’t install anything from npm today, folks.

Every time I look at a JavaScript date object, I want to quit my job and become a farmer. @nik.digital @smashingconf.com

It's @mattzeunert.com on stage talking about everyone's favorite topic - Largest Contentful Paint (LCP) 🔥🔥🔥 @smashingconf.com @debugbear.com

Hallo Freiburg, hallo @smashingconf.com 👋 But first, time to eat black forest cake 🍰

📝 My new article shows you a simple way to turn any Bluetooth speaker into an AirPlay receiver using a Raspberry Pi. This hack not only lets you stream to a single speaker but also enables a multi-room audio setup. 🔊 Check out the full guide here: dev.to/henrylim96/t... #DIY #RaspberryPi

We’ve launched MDN’s new front end — and it’s just the beginning. Intentionally targeting Baseline "Widely available" features when deciding on which ones to use. This means we're able to adopt modern CSS and web components for our UI. Check it out 👇 developer.mozilla.org/en-US/blog/...

URLPattern lets you parse URLs using familiar route syntax. It’s now in Chrome & Firefox, but it’s likely to land in the next version of Safari. developer.mozilla.org/en-US/docs/W...

It is time for Chrome DevTools! 🎆 @matthiasrohmer.bsky.social is now on stage showing all the less known features of DevTools like Autofill, Emulate Focused Page, Network Overrides, and more. (Where are you @jec.fish? 🥹) #GoogleIOConnect @robertnyman.com

Boss @paul.kinlan.me and @rachelandrew.bsky.social are on stage at Google I/O Connect Berlin sharing all the hottest web features 🔥 #GoogleIOConnect