Posts by firefoxwebdevs@mastodon.social
 (DIR) Post #B5isKDwQpFBUuo66KW by firefoxwebdevs@mastodon.social
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       CSS's light-dark() now accepts images, making it simpler to define alternate values for a dark color scheme. Here's how it works:
       
 (DIR) Post #B5odNamU23oIFuLsRc by firefoxwebdevs@mastodon.social
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       Chrome looks set to ship an LLM Prompt API to the web platform. At Mozilla, we oppose this API.We feel it has a large interoperability risk, and Google imposing T&Cs on a web API sets a dangerous precedent.Full details: https://github.com/mozilla/standards-positions/issues/1213#issuecomment-4347988313
       
 (DIR) Post #B5omyZxGxuErzo6sEq by firefoxwebdevs@mastodon.social
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       @a1ba sure looks like it
       
 (DIR) Post #B5uk4E4U6hoywrFBLc by firefoxwebdevs@mastodon.social
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       @mangeurdenuage is this error reproducible? Can you create a demo?
       
 (DIR) Post #B63iQNzfRhF8bh4LDM by firefoxwebdevs@mastodon.social
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       Recently, we fixed an unprecedented number of latent security bugs in Firefox identified by Claude Mythos Preview.Here's how we approached this work, what we found, and what we learned:https://hacks.mozilla.org/2026/05/behind-the-scenes-hardening-firefox/
       
 (DIR) Post #B6QLfTeKs0zeBMOeJ6 by firefoxwebdevs@mastodon.social
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       Chrome shipped an LLM Prompt API to the web platform. At Mozilla, we oppose this API. Here's why:
       
 (DIR) Post #B6QLfU4DJnh3TcVJdw by firefoxwebdevs@mastodon.social
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       Our full standards position: https://github.com/mozilla/standards-positions/issues/1213#issuecomment-4347988313
       
 (DIR) Post #B6UOlZQpMWD4LbVzea by firefoxwebdevs@mastodon.social
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       CSS style() queries landed in Firefox 151 making them newly available across engines. Here's how they work:
       
 (DIR) Post #B6UOlZxnNwa5zqwK2a by firefoxwebdevs@mastodon.social
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       And here's the full documentation on MDN https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Containment/Container_size_and_style_queries#container_style_queries
       
 (DIR) Post #B6UOlgbigQ58bPfI6S by firefoxwebdevs@mastodon.social
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       Firefox 151 is out now, and brings with it some tasty new web platform features:🎉 Container style() queries🎉 Web Serial API🎉 Document Picture-in-Picture API🎉 keyboardLock on requestFullscreen…and more!https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/151
       
 (DIR) Post #B6gmfVZlzbgYoNbwu0 by firefoxwebdevs@mastodon.social
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       Which of the following CSS features would you prefer Firefox to support first?(note that we already support the quirky -webkit-line-clamp)
       
 (DIR) Post #B6l5WIv6LyUOiNkfBo by firefoxwebdevs@mastodon.social
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       The Web Serial API landed in Firefox 151, allowing you to connect directly to microcontrollers, dev boards, 3D printers, power meters, and other serial-connected hardware from the web. Here's how it works:
       
 (DIR) Post #B6l5WJIqvfUJu2rdD6 by firefoxwebdevs@mastodon.social
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       See our announcement post for more detail, demos, and docs https://hacks.mozilla.org/2026/05/web-serial-support-in-firefox/
       
 (DIR) Post #B6l7FTj97SGjDaGRc0 by firefoxwebdevs@mastodon.social
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       @hj what do you mean by 'ok' here?
       
 (DIR) Post #B6l7deqPRBl4eCBuXw by firefoxwebdevs@mastodon.social
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       @hj Web Serial is the second API we've applied this new permission flow to, the other being WebMIDI. We'll continue to look at other APIs on an individual basis.
       
 (DIR) Post #B6lA2UemeRZiCPivaq by firefoxwebdevs@mastodon.social
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       @hj which sites do you use that use it, or what are your use-cases for it as a developer?
       
 (DIR) Post #B6tKrAYpgGjBRoQF6W by firefoxwebdevs@mastodon.social
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       We're experimenting with a way to visualize session history in Firefox DevTools, and we'd love your feedback!Here's the background, and how to try it: https://blog.farre.se/posts/2026/06/01/session-history-diagrams/
       
 (DIR) Post #B6vMMJD83iQPWRbQzA by firefoxwebdevs@mastodon.social
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       Ever struggled to get heading tags right in includes/components? headingoffset could be the answer…
       
 (DIR) Post #B8K1amSjfF5YEEW9mS by firefoxwebdevs@mastodon.social
       1 likes, 1 repeats
       
       Generally: Using Firefox Nightly (with analytics on), and reporting bugs to Bugzilla, is a _huge_ way to contribute to Firefox.Firefox Nightly is more stable than other browser's Nightlies, and for a technical user it totally possible to use it as your main browser.For your specific case, it seems like there's a bunch of UI issues relating to a particular form-factor & OS - I think it's ok to file a single issue to collate those. We can break them out if needed.
       
 (DIR) Post #B8Z2WT7Kf5GSOhPfpQ by firefoxwebdevs@mastodon.social
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       @gamingonlinux fwiw ➡️ @FirefoxOfficial (it isn't fully up and running yet)