2026-04-30T16:06:50Z https://yabu.me Firefox for Web Developers https://yabu.me/npub1ec6tkw5u5svld676mwp2sdmx8gmrzkeznuavrwreyju4e63sj26scht4g5 https://files.mastodon.social/accounts/avatars/115/667/120/638/353/806/original/93c1bf917d9c5cbd.png https://files.mastodon.social/accounts/avatars/115/667/120/638/353/806/original/93c1bf917d9c5cbd.png https://yabu.me/nevent1qqsgkytkn5n7um245fzzjela6nx5qm06mdf024n4w44wl3jh2gwpy9szyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2thu7hy Chrome looks set to ship an LLM Prompt API to the web platform. At Mozilla, we oppose this API.<br/><br/>We feel it has a large interoperability risk, and Google imposing T&amp;Cs on a web API sets a dangerous precedent.<br/><br/>Full details: <a href="https://github.com/mozilla/standards-positions/issues/1213#issuecomment-4347988313">https://github.com/mozilla/standards-positions/issues/1213#issuecomment-4347988313</a> 2026-04-30T09:04:38Z https://yabu.me/nevent1qqs8mqpzmksz5gkjpucl34zjr6ty39tg8lk3y3f249xa8dx7kmkkaugzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft24asw8l hasUAVisualTransition landed in Firefox 149, making it available across all major engines. As well as having a very catchy name, it lets you avoid doubling up on page transitions. Here&#39;s how it works:<br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/116/295/980/096/103/884/original/411a24edc30e5286.mp4"></video><br/> 2026-03-26T14:38:35Z https://yabu.me/nevent1qqsr4mglsz3mnw3np2vpkldc647y2tfu3hz7c7nm4w9x70zx3rdg9cgzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft20uu0gu CSS shape() landed in Firefox 148. It&#39;s similar to path(), but allows the full expressiveness of CSS…<br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/116/160/200/898/847/330/original/75ea6466e5193fc7.mp4"></video><br/> 2026-03-02T15:06:52Z https://yabu.me/nevent1qqs28e86ug5shhd26ng645upah4ek43t0uks7wfpdgeze3cfme826vqzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2gy7a5k You can throw away innerHTML and replace it with the new setHTML(), which has a built-in sanitizer. Here&#39;s how it works:<br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/116/131/184/985/046/869/original/6c80e04b5cc9f08b.mp4"></video><br/> 2026-02-25T12:07:54Z https://yabu.me/nevent1qqs0mdu8h5qq43refkswq5p8uc57fgr7qjfwykt5pqx264cg530aedczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2jsg35t HTML might be getting a new type of tag, which… hasn&#39;t happened this millennium. Here&#39;s the new syntax, and how it works.<br/><br/>And here&#39;s the explainer on HTML patching <a href="https://github.com/WICG/declarative-partial-updates/blob/main/patching-explainer.md">https://github.com/WICG/declarative-partial-updates/blob/main/patching-explainer.md</a><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/116/080/843/869/386/478/original/32d1a22b837fa54a.mp4"></video><br/> 2026-02-16T14:45:37Z https://yabu.me/nevent1qqstjppa7989mpgwyxf3nuy6vc4lt8hy8xhlyl0n2n7andupt84zpdgzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft25lx7np If you had to pick _one_, which web platform feature would you like in Firefox that isn&#39;t part of the Interop 2026 effort? <a href="https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features">https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features</a> 2026-02-13T09:34:51Z https://yabu.me/nevent1qqsqlh28c2yp5xukxu23vqvw2q9mymtuenwwm6f7cclngq7amnulcaczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2h6wvqv In reply to <a href='/nevent1qqspkf5earzcf9my7gjfuug535wxpw7jh5p05sjnfdke83mmkrhtt9cqrc9c6'>nevent1q…c9c6</a><br/>_________________________<br/><br/>here&#39;s the help page, so you can judge for yourself <a href="https://support.mozilla.org/en-US/kb/firefox-ai-controls">https://support.mozilla.org/en-US/kb/firefox-ai-controls</a>. We mostly refrain from using &#34;opt-in&#34; because people have different definitions of opt-in, e.g. some have said it&#39;s only opt-in if it&#39;s in a separate binary.<br/><br/>I asked for UI that shows downloaded models, but there wasn&#39;t time for that in 148. I&#39;ll keep asking for it 😀 2026-02-03T12:34:00Z https://yabu.me/nevent1qqs8ga7khgaw6qztzetz0lly08cc0nth7xkf2asvukkpezl9l7v367qzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2ejmgsf In reply to <a href='/nevent1qqsgqh3k9zrdl26k5rmkrsnk0c6hw6qk5aqujf30j9cljdw9qxsk9rcqx5rt5'>nevent1q…5rt5</a><br/>_________________________<br/><br/>I don&#39;t think it&#39;s particularly unusual to offer features at the point they might be useful. This follows the pattern of e.g. asking for microphone permission. You&#39;re asked at a time that it might be useful to you, you don&#39;t have to say yes, and there are ways to avoid ever being asked. 2026-02-03T12:19:36Z https://yabu.me/nevent1qqs8jkxav6uy54tpcf64lytlj0x564h3gggnd43s3z3j07jcdv7mzqczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft224k3uy In reply to <a href='/nevent1qqsq7n3vvwdr5eh0v36729a48hkv5whjzmznpaaelzw5rzzhd5wnk7c3n03ql'>nevent1q…03ql</a><br/>_________________________<br/><br/>fwiw, the individual features are, to some extent, opt in. As in, AI models are not downloaded and used until you engage with the feature, e.g. via the &#34;Suggest more of my tabs&#34; button.<br/> <img src="https://files.mastodon.social/media_attachments/files/116/006/610/433/200/223/original/bd12f5f4102a07ca.png"> <br/> 2026-02-03T12:07:23Z https://yabu.me/nevent1qqs08tzfyfelq9vj8xgny5xt3ys2xjfrly63surld6mmu6cxdcv6t6qzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft242edad In reply to <a href='/nevent1qqs9y52d5wrmdm4vezw2hddz9s0z35y6p4v6sery4p2k0n5fl924wfsau5u4s'>nevent1q…5u4s</a><br/>_________________________<br/><br/>translation is valuable for reading parts of the web that aren&#39;t in a language you can understand. Tab group naming means you can select a bunch of tabs and the model tries to come up with a decent name. Generated alt text helps improve the accessibility of PDF documents. 2026-02-02T22:58:16Z https://yabu.me/nevent1qqswr9elu8hxfs2g57javs7n922d6pc3hjkv67d9nhslq5634ejdnvqzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2rrctze In reply to <a href='/nevent1qqsffzzd4klgrsjr8zjxy9fl5d2alr2ny3tlq6zx89je7h5dha9wctcmyjpcx'>nevent1q…jpcx</a><br/>_________________________<br/><br/>Sad to see you go. Fwiw, LibreWolf has translation very similar to Firefox&#39;s, which most users consider to be AI. 2026-02-02T22:44:34Z https://yabu.me/nevent1qqs8qr034mzyenm2vjayedr04tmawkd94vzh25jcgjx0pjst80uvwfgzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2fcm9am In reply to <a href='/nevent1qqs2666za09xh3g5zd2jdq5uyd7wgalxv3ekc3tk3r8k7s78qcwg6tc5gay63'>nevent1q…ay63</a><br/>_________________________<br/><br/>I&#39;m not sure what we can do to convince you other than hold the promise over time. 2026-02-02T19:21:51Z https://yabu.me/nevent1qqsyycz5w2xvlkfcw5qk0mfy8uxpau4rauyw78aynscpjcgrdnn86fqzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2x35ymw AI Controls (formally &#39;kill switch&#39;) are landing in today&#39;s Firefox Nightly, and will land with Firefox 148 later this month. <br/><br/>For the full details, see the Firefox blog <a href="https://blog.mozilla.org/en/firefox/ai-controls/">https://blog.mozilla.org/en/firefox/ai-controls/</a><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/116/002/119/428/537/379/original/5dcfa9e0a8ba85a4.mp4"></video><br/> 2026-02-02T17:04:39Z https://yabu.me/nevent1qqswmgkqek3pexal6dfrdv7uv3ahgkf92x3vs5rhnxdwatfaswn8rmczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft292ttk5 CSS module scripts landed in Firefox 147, so you can import CSS directly into JavaScript.<br/><br/>Docs:<br/><br/>Import attributes <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import/with">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import/with</a> <br/>CSSStyleSheet <a href="https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleSheet">https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleSheet</a><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/115/944/881/429/553/149/original/7d8c7fc4b8b4eed6.mp4"></video><br/> 2026-01-23T14:28:29Z https://yabu.me/nevent1qqs9zgdn0h9dnjygjqqehnez27s4m9h0de2vt0w2khmyaku0tr9k8fszyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2z3084x The Navigation API is newly baseline! The web now has sensible, low-level routing for navigations.<br/><br/><a href="https://developer.mozilla.org/en-US/docs/Web/API/Navigation_API">https://developer.mozilla.org/en-US/docs/Web/API/Navigation_API</a><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/115/899/077/652/747/471/original/34c0fece654b2127.mp4"></video><br/> 2026-01-15T12:20:28Z https://yabu.me/nevent1qqs2vgzg4spf0t96sfm5ywgpcmv3gtzss3vflvdjjfwzslflkc2lvjgzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2epj464 In reply to <a href='/nevent1qqsxvv7tjvn7pu5nwwnq5mdv9l5ahal4krx2d9dh82ksq0f95glumecfnwcas'>nevent1q…wcas</a><br/>_________________________<br/><br/>Anyway, Firefox 147 is out next week, and it includes a pretty big drop of web platform features which I&#39;m looking forward to presenting! Although, the winter &#39;ill&#39; seems to have finally caught up with me. Let&#39;s see if I have a voice left for the recordings. 2026-01-08T14:32:22Z https://yabu.me/nevent1qqsxvv7tjvn7pu5nwwnq5mdv9l5ahal4krx2d9dh82ksq0f95glumeczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2yplfpq In reply to <a href='/nevent1qqsf3h78mglhrdqc9dztvmr3h9ckw05f3ehdcywgs4xxupdtaunlqkg0f3xlp'>nevent1q…3xlp</a><br/>_________________________<br/><br/>This account is about web platform features and DevTools in Firefox. I only got personally involved in the AI kill switch because of previous feedback from many of you here.<br/><br/>I know many of you wanted, instead, a broader referendum on &#39;AI&#39; features in Firefox. However, I&#39;m not personally in a position to action results of such a poll. Whereas I was confident I could do something about the results of the poll I ran, which is why I ran it. 2026-01-08T14:32:05Z https://yabu.me/nevent1qqsf3h78mglhrdqc9dztvmr3h9ckw05f3ehdcywgs4xxupdtaunlqkgzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2yg7z5e In reply to <a href='/nevent1qqsfdmnr0apg8g99sd5nsthu33q5nxf5zk2nfmlf22z2k3xx8g8hwxsvzxydg'>nevent1q…xydg</a><br/>_________________________<br/><br/>Thank you everyone who responded to this.<br/><br/>For context: I saw mocks of the kill switch where translation was included, but it lacked the ability to enable the kill switch but still enable particular features (such as translation).<br/><br/>The results of this poll helped me successfully push for more granular control in addition to the single AI kill switch. So again, thank you for that. 2026-01-08T14:31:13Z https://yabu.me/nevent1qqs06rtcu0e9l8jqmt4sj2f55wvupj4f8ydayzu9h3t8stek0d87dhczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2h5fvdg In reply to <a href='/nevent1qqsxf6mqptsza6ugef7lcmmmex8cmhtvuqh8sk4uygr4w5dj7a9e7qqq5z4lg'>nevent1q…z4lg</a><br/>_________________________<br/><br/>ah, I thought 🤷 was well understood to mean &#34;I don&#39;t know/care, I just want to see the results&#34;. It&#39;s pretty commonly used, but clearly not commonly enough. Sorry! 2026-01-07T15:42:52Z https://yabu.me/nevent1qqsyfn6l048frkktv254nx774ael3ltgfwgge7e9pqe0u8mu458aetczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft23nkj7d In reply to <a href='/nevent1qqsq5mfraqvzmlrn02xpgmkd4qgyrwkfsqqkc8ag0k89ynhdupelgdsawkwjn'>nevent1q…kwjn</a><br/>_________________________<br/><br/>no external service is used. I&#39;m not sure on the resources used for training, but it&#39;s useful to know that would factor into your decision. The project is here <a href="https://github.com/mozilla/translations">https://github.com/mozilla/translations</a> 2026-01-06T17:21:57Z https://yabu.me/nevent1qqsfdmnr0apg8g99sd5nsthu33q5nxf5zk2nfmlf22z2k3xx8g8hwxszyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2mh06yw Firefox uses on-device downloaded-on-demand ML models for privacy-preserving translation.<br/><br/>They&#39;re not LLMs. They&#39;re trained on open data.<br/><br/>Should translation be disabled if the AI &#39;kill switch&#39; is active? 2026-01-06T17:08:04Z https://yabu.me/nevent1qqs8m9cvvhj8d47c0jp2swquygy48eqxsgfr8hteydztxd5tc4cu85szyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2k22rg6 In reply to <a href='/nevent1qqsql322ys3tshxz4emslgmrhlav3hrg64le7r3fsn4xn4us2cvgudctd3n56'>nevent1q…3n56</a><br/>_________________________<br/><br/>that sounds reasonable to me. Since Firefox is fully open source, you can follow along with the development in places like <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=2005800">https://bugzilla.mozilla.org/show_bug.cgi?id=2005800</a> 2025-12-19T15:17:24Z https://yabu.me/nevent1qqs0k6eyn4glqxq0da6s57reqda5v8qy7h74ukg7dq5khu9fpvsx6ygzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2dls25k In reply to <a href='/nevent1qqs0zearls07awjss25fcdrxz2yhjxvsqjmjm5cj7637hg33uqaly7cnl4j9z'>nevent1q…4j9z</a><br/>_________________________<br/><br/>sounds like the kill switch will be ideal for your use-case 2025-12-19T15:11:59Z https://yabu.me/nevent1qqsduecqfqzf8v6vs0qw595cqhym60f09yr9ffpsezfvua0cpqehumqzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2ydxpxn In reply to <a href='/nevent1qqsvma42yavzpw8x9arnsuquz6grn36kvs8svvef0ry4wvuflc0wdhcermcvy'>nevent1q…mcvy</a><br/>_________________________<br/><br/>how have those features surfaced in the browser UX for you? 2025-12-19T15:04:19Z https://yabu.me/nevent1qqsztzuvc94rz0fy37alfkmmdur498p5rr6y026d2ecjxh2ltzh30xqzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2yj3qyr In reply to <a href='/nevent1qqsxv7nm79yl4jpm0qgvtrfcf43jtn9ay6eamwy39w7usxncpe4qgdqxjque4'>nevent1q…que4</a><br/>_________________________<br/><br/>yes. The features are opt-in (but some disagree on what that means), whereas the kill switch is an unambiguous &#34;never offer me this stuff ever&#34; 2025-12-19T13:11:40Z https://yabu.me/nevent1qqs8mh68slzjmw6uqvuhx7x6943hrxajdfej224t5z2xcg5zhfq0d2qzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2tp0zjk In reply to <a href='/nevent1qqswjmfn9veg7wzx2ctvw2tzpsrexhvqrhtd53chga2trtup57qyskge72t5y'>nevent1q…2t5y</a><br/>_________________________<br/><br/>which features have you personally experienced this with in Firefox? 2025-12-18T13:39:01Z https://yabu.me/nevent1qqsw49rfxda7xsrx600h3auyq49dmxdntysee0dx8u46p9jcalngw4qzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2k23y3u In reply to <a href='/nevent1qqsw3syt97ck5sw4xh6adknm85mp75tgkmfrgjplwm06pwz8rugkv8cnxnyhp'>nevent1q…nyhp</a><br/>_________________________<br/><br/>Just be glad this thread wasn&#39;t a long-ass video. It almost was. 2025-12-18T12:16:28Z https://yabu.me/nevent1qqsw3syt97ck5sw4xh6adknm85mp75tgkmfrgjplwm06pwz8rugkv8czyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft232ydaf In reply to <a href='/nevent1qqsp6tyzku2aaxvsxenu7jv0vwwm284kzpv4yxwtjqdcn7ms4lfcjvc0ddvn0'>nevent1q…dvn0</a><br/>_________________________<br/><br/>I hope we can (re)gain your trust here.<br/><br/>I don&#39;t personally work on this stuff, but I&#39;ll try hard to answer any questions you have.<br/><br/>And other than that, I&#39;ll get back in my lane, and stick to web platform stuff.<br/><br/>- Jake (<span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1dpjjsyh6ag5p0anhrpzp8d73var3v5l06t4aktylcgslef40ff2q08e0jl" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Jake Archibald</span> (<span class="italic">npub1dpj…e0jl</span>)</a></span>) 2025-12-18T12:12:08Z https://yabu.me/nevent1qqsp6tyzku2aaxvsxenu7jv0vwwm284kzpv4yxwtjqdcn7ms4lfcjvczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft27ty9dn In reply to <a href='/nevent1qqs8tphe6g5an3hy9sxk9jk95s9xp98gtxfhx27yvahyfcla895meag0v8k3t'>nevent1q…8k3t</a><br/>_________________________<br/><br/>I&#39;m not asking for faith in our direction - the thing I love about the Firefox community is how open, honest, and technical it is.<br/><br/>But I do ask that you don&#39;t have the opposite of faith. Like, try not to be determined that we&#39;re going to do the wrong thing here.<br/><br/>… 2025-12-18T12:11:37Z https://yabu.me/nevent1qqs8tphe6g5an3hy9sxk9jk95s9xp98gtxfhx27yvahyfcla895meagzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft20cn9hs In reply to <a href='/nevent1qqsxeecd0kracxjffqlhmxusa8y93wtrjcqupwm9jxftf8mr6yxnwjc32z6cq'>nevent1q…z6cq</a><br/>_________________________<br/><br/>All AI features will also be opt-in. I think there are some grey areas in what &#39;opt-in&#39; 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&#39;s unambiguous.<br/><br/>… 2025-12-18T12:11:29Z https://yabu.me/nevent1qqsxeecd0kracxjffqlhmxusa8y93wtrjcqupwm9jxftf8mr6yxnwjczyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2r6c9aq Something that hasn&#39;t been made clear: Firefox will have an option to completely disable all AI features.<br/><br/>We&#39;ve been calling it the AI kill switch internally. I&#39;m sure it&#39;ll ship with a less murderous name, but that&#39;s how seriously and absolutely we&#39;re taking this.<br/><br/>… 2025-12-18T12:11:21Z https://yabu.me/nevent1qqswlyjze6apa8v7ms54zfpkwcdup33j33vvcncup873gpe9zcpyjsqzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft2e3vuv8 HTML invoker commands are newly baseline! Here&#39;s how they work…<br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/115/730/147/616/175/500/original/de4da486da9c8266.mp4"></video><br/> 2025-12-16T16:24:41Z https://yabu.me/nevent1qqsdenknjxvy643529z7d9f62jchpck8agz7vsl6qzakm475wtcscsqzyr8rfwe6njjpnahtmtdc92phvcarvv2my20n4sdc0yjtjh82xzft287k6aw CSS @​scope has landed in Firefox 146, making it a new baseline feature. Here&#39;s how it works:<br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://files.mastodon.social/media_attachments/files/115/690/427/909/270/430/original/4a91e961b8d2017e.mp4"></video><br/> 2025-12-09T15:57:54Z