Here are the browser bug reports: https://t.co/YBZSZSRCAL https://t.co/6kIkm4oOMi And the spec discussion: https://t.co/UrgqcpPMnp

HTML hidden=until-found and auto-opening <details> is newly baseline… or is it? Here's how it works, and issues to watch out for:

Abacus Global Management Announces Transfer of Listing of its [Class A] Common Stock to the New York Stock Exchange with New Ticker Symbol $ABX | Press Release Abacus Global Management, Inc. (@Nasdaq: $ABL), a leader in the alternative asset management space, today announced its

@jaffathecake Just be glad this thread wasn't a long-ass video. It almost was.

I hope we can (re)gain your trust here. I don't personally work on this stuff, but I'll try hard to answer any questions you have. And other than that, I'll get back in my lane, and stick to web platform stuff. - Jake (@jaffathecake)

I'm not asking for faith in our direction - the thing I love about the Firefox community is how open, honest, and technical it is. But I do ask that you don't have the opposite of faith. Like, try not to be determined that we're going to do the wrong thing here. …

All AI features will also be opt-in. I think there are some grey areas in what 'opt-in' means to different people (e.g. is a new toolbar button opt-in?), but the kill switch will absolutely remove all that stuff, and never show it in future. That's unambiguous. …

Something that hasn't been made clear: Firefox will have an option to completely disable all AI features. We've been calling it the AI kill switch internally. I'm sure it'll ship with a less murderous name, but that's how seriously and absolutely we're taking this. …

HTML invoker commands are newly baseline! Here's how they work…

JavaScript declarations in conditionals was discussed at TC39 recently, but consensus broke down over one key detail. How do you think it should behave?

Firefox 146 ships improvements for CSS devs 🎨 • contrast-color() for WCAG-friendly contrast • display-p3-linear color space • text-decoration-inset • scope at-rule now on by default • -webkit-fill-available for better compat Release notes 👇 https://t.co/COabcLwqTv

Mastering layout = Mastering Flexbox Test your understanding with MDN’s hands-on Flexbox exercises. No setup needed, just code and see what happens, with interactive scrims ✨ 💡 Learn by solving https://t.co/MCULzRltxE

We're not going to do version-by-version posts on WebDriver here in future, so if you want that, subscribe to the RSS at https://t.co/ItigbTnsRO.

🚀 A bunch of #WebDriver features and fixes landed in Firefox 146. WebDriver is the W3C standard for interoperable browser automation, for things like testing tools, and MCPs. Keep up to date with all the progress here: https://t.co/HP94GlvaVR

❓ Do you have a need for range inputs with 3+ sliders on the web? Folks are scoping out this work, and want to know your use-cases ⬇️

In Firefox 146 DevTools, long lists of unused CSS custom properties collapse, decluttering the UI, and improving performance

Fine-tune multilingual typography with text-autospace ✨ It lets you control spacing between CJK and Latin characters. > text-autospace: ideograph-alpha ideograph-numeric punctuation; Now available on Baseline 2025. 🎉 Learn more 👇 https://t.co/EAODObmYP6

And of course, it's already documented on MDN

CSS text-decoration-inset landed in Firefox 146! Here's how it works:

A bunch of web platform features and bug fixes landed in Firefox 146. There'll be more videos about the highlights soon, but in the meantime, here's a summary:

Lean more about the feature at MDN