@webdevs.firefox.com
Official Firefox account for people who build on the web. Learn about the things we're working on to grow and improve the web platform.
@webdevs.firefox.com PinnedFirefox 153 just landed, and comes with web platform features like:
🎉 popover="hint"
🎉 Picture-in-picture
🎉 IDB getAllRecords()
🎉 JS Promise Integration for wasm
🎉 JS import-as-text
…And more! developer.mozilla.org/en-US/docs/M...
@webdevs.firefox.comThank you! I wanted to add it for last year, but ran out of time.
@webdevs.firefox.comI had 50 ranked, then removed them to record a video, thinking I was on my dev server rather than live 😭
@webdevs.firefox.comYay! It remembers your answers too, so if you add another item and do "help me order these" again, it'll just ask you the questions to place that new item.
@webdevs.firefox.comIt seems like no one proposed this for Interop 2027 😭
@webdevs.firefox.comRank all 20! The site will suggest you don't, but… eh we're not going to stop you.
@webdevs.firefox.comIt was one of the proposals. Make sure you add it to your list!
@webdevs.firefox.comIt was one of the proposals. Make sure you add it to your list.
@webdevs.firefox.comWe ran this last year to decide what to champion for Interop 2026, but the data was so good, we also used it to prioritise features beyond the Interop project. We've also added some features to make it quicker to rank items.
@webdevs.firefox.comWhat do you want us to work on in 2027?
Here's a web app where you can rank the Interop proposals you care about, giving us data we can use to prioritise feature development.
@webdevs.firefox.comNo, but it's on the way github.com/mdn/content/...
@webdevs.firefox.comIf the panel for a source is focused, ctrl/cmd-w will close that panel, rather than the tab.
@webdevs.firefox.comIt's part of Interop 2026, so it's on its way. Although, scroll-driven-animations will land first.
@webdevs.firefox.comFirefox 157 has landed, and includes a couple of useful CSS features: 🎉 at-rule() in @supports - lets you limit rules to browsers that support a given at-rule. 🎉 overscroll-behavior: chain - lets scrolling pass up to parent elements, but prevents UA effects like 'bounce' and overscroll. …And more!
@webdevs.firefox.comno, headingoffset=0 doesn't change anything. You'd need to use headingoffset=1 on each 'section' of your article to be able to use h1 everywhere.
@webdevs.firefox.comCould you file this on bugzilla.mozilla.org/home and give me the link?
@webdevs.firefox.comHere's the main ticket bugzilla.mozilla.org/show_bug.cgi... - it's part of interop 2026 so we're working on it.
@webdevs.firefox.comYeah, the 'when' refers to individual parts of the custom property value. It is always computed to some degree.
@webdevs.firefox.comReposted by @webdevs.firefox.comWhen and how CSS custom property values are calculated might not be what you expect, and it has a big impact on your styles…
@webdevs.firefox.comThis video came about because someone was making a circle of elements using rotate, then counter-rotating the first child within each of those (so the text was always straight). Because the property was unregistered, the counter-rotate wasn't working.
@webdevs.firefox.comWhen and how CSS custom property values are calculated might not be what you expect, and it has a big impact on your styles…
