The @firefoxdevtools.bsky.social JSON viewer got better in @firefoxnightly.bsky.social : the console offers access to the original json data via `$json`. This allows to easily manipulate the underlying data to get what you want

A fun question. In 5 years time, what looks better? The US’s enormous bet & capex on AI? Or China’s equally enormous bet and capex on renewables?

A classic example of being cautious about frameworks and the magic they provide

Not off to a good start with my undefined Eurostar 😅

No lies detected.

#perfnow absolutely fantastic and compelling demos from @rich-harris.dev but I'm trying to resist concerns on his preference for tabs over spaces...😂

Interesting! Etsy implemented speculation rules and got these results: 👍 Time to First Byte on the listing page improved 23.6% 👍 First Contentful Paint improved 20.7% 👍 Largest Contentful Paint improved 21.1% 👍 DOMContentLoaded improved 20.4% #PerfNow #webperf www.etsy.com/codeascraft/...

Yoav is a force to be reckoned with and if you ever get the chance to work with him, jump at it. I learned a lot from him during his time at Google.

It's very humbling to see your work appear in lots of talks at a conference and a good reminder of how grateful I am to get to work on DevTools 🥰

#PerfNow request throttling is behind a flag in Canary right now, you can enable it in chrome://flags. But please be aware it's not fully feature complete yet and still being worked on! However it is coming to Chrome stable in the future 🙂

"I DON'T NEED YOU TO FUCKING REWRITE WHAT I'VE JUST WRITTEN!"

Pretty cool to see someone whose blog you read avidly 15 years ago when you were learning web development posting praise of what you work on now

Unreasonably excited for a 4.5 hour London > Amsterdam train ride tomorrow 🚂

The speed at which my Framework laptop goes from completely shut off to me browsing in Chrome still blows my mind when I compare it to my much more expensive work issue M1 MBP.

I have seemingly randomly gained a lot of followers overnight. Did I get mentioned in something somewhere? I'd love to know where you found me 😅

People that use email providers that are not Gmail: what do you use? Happy to pay a small fee for a good service.

This article about the decline of Apple's UI and attention to detail is very good but also you can swap Apple for literally any tech company who are forgetting anything that isn't AI AI AI blog.johnozbay.com/what-happene...

Did we all celebrate that `::details-content` works in all major browsers now? 🎉 developer.mozilla.org/en-US/docs/W...

I spent 2 hours working on a side project last night and as an experiment I decided to try to exclusively use AI and not code myself. Results were very mixed...for showing me usage of a new library it was great, and a very repetitive manual task it did easily, but anything beyond that was a struggle

"I have a decent fluency in LLMs, and they have utility, but the absurd degree of over-hype, the way they're being forced on everyone, and the insistence on ignoring the many valid critiques about them make it very difficult to focus on legitimate uses where they might add value."

It's here. JavaScript for Everyone is now available to…everyone! The amount of effort and experience packed into this course is unbelievable and we know you're going to love it. Get yours for £189, down from £249, for 2 weeks and super-charge your career prospects piccalilli.link/js4e-launch-...

Pretty proud of this; this is the result of about 3 years worth of work to reconcile our trace processing and insight/audit generation across DevTools, LH and PSI. And now it's here! It's been a huge team effort and the fact that we have one trace engine for all of these surfaces is a huge win.

Lighthouse 13 has been released and includes the final move to Insights performance audits as announced previously. developer.chrome.com/blog/lightho...

"AI tools amplify existing expertise." exactly!

Can relate. Started uni in 2010, got into going to meet-ups, blogging and tweeting and pretty much every job since has been influenced by someone I met doing all that. It's the thing that makes me most sad about about what Twitter has become.

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!

If you're a speaker, please do yourself a huge favour and buy a clicker. You can still stand close to the laptop, but it makes things much more seamless. (I will die on this hill :D)

I have an incredible talent for picking the wrong sized tupperware

Pretty cool how you can go from writing a web framework or some React to being a fan of Tommy Robinson or hanging out with Israeli prime ministers; I appreciate all the opportunities the web gives people

show this to anyone else you know who also assumed DHH was just a normal conservative dude rather than a raging white supremacist lunatic

React 19.2 has shipped including support for the DevTools Extensibility API so you can understand what React is doing when, and how that relates to the rest of the performance profile 🥳 🎉 react.dev/blog/2025/10...

Hey #MCPDevSummit! I'm looking forward to speaking later on our experiences building the new @developer.chrome.com MCP server. I'd also love to hear your feedback, feel free to say hello and chat! Look for the tall man with a green shirt and glasses 🤓

Wrote up a quick blog post about my first week of using AirPods on Android: www.jackfranklin.co.uk/blog/using-a... Why? I struggle to find comfortable in-ears (maybe I have weird ears! :D) and thought I'd try these. So far I'm very happy & the limitations of non-iOS haven't impacted my experience.

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.

Sometimes you just need to clear your head, take a day off and spend time on your super cool hobby...

Well well well!

Google’s @jackf.io is speaking at the London MCP Dev Summit 🎤 Topic: Lessons learned building the Chrome DevTools MCP Server 👉 Don’t miss it: buff.ly/MwmiH5E (early bird pricing ends in 2 days!) #MCPservers #DevToolsAI

It is incredible to me that so many people say that they rely heavily on AI to generate tests. Having seen how reliable its code output is, I would never trust its tests. I've used it successfully to generate a list of test cases or spit out boilerplate, but any more and I'd be very wary.

The web industry is getting all excited about using AI to build complex apps and meanwhile I'm sat here on coffee shop wifi and the internet is barely usable.

Thought it was weird I hadn't had a DM reply from someone and then I realised I need to verify my age 🙄

“The reason SPAs became the default wasn’t because they were better. It was because, for a while, they were the only way to deliver something that felt fluid – something that didn’t flash white between pages or jank the scroll position.” www.jonoalderson.com/conjecture/i...

Really awesome blog post! The perf extensibility API is really cool (although I am biased...) and worth your time to add custom data to the performance traces on your sites. Also, the issue Harry mentions where marks don't show timestamps is absolutely a bug, and will be fixed in Chrome M140.

@csswizardry.com hey! Thanks for your blog post on the extensibility API :) One thing stood out - you mentioned that timestamps are not shown for markers, which I agree is unhelpful, so I've fixed it in crrev.com/c/6787872 and after that lands, timestamps are shown on hover + on click :)

Currently have two large 28" monitors, one landscape, one portrait, but quite close to going back to just one larger (32") monitor...but will I miss the extra space?!

UK Prime Minister needs to get off Twitter/X and stop stoking race hate. Instead focus on improving living standards for citizens. People working hard in precarious delivery roles are not depriving others of these aspirations! Christ

This thread is incredible.

Really embracing fatherhood, took a day off to spend clearing out the shed and going to the model railway shop 😂

The Steam summer sale is such a great chance to buy more games I'll never play.

Firefox shipping scheduler.postTask() and scheduler.yield() for all your long task-avoiding scheduling needs!!

Today I learned that the Thames Water office is based at a building called... Clearwater Court 🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️