If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort?
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs a moratorium on new features so that we can focus on catching up and stabilizing and fixing bugs
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs NO AI
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs For JS `fetch()` interop, in 2026 it would be nice to get proper `user-agent` header control.
It has been an allowed/customizable header according to specs since 2015, but (to the best of my knowledge) it still doesn't work on some browsers (for reference, Firefox already supports this).
It already has a WPT test: https://github.com/web-platform-tests/wpt/pull/39301 -
If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
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@firefoxwebdevs File System Access API. I'd be fine if you carved out `showDirectoryPicker()`, or put it behind a scary permission prompt. It enables so many powerful editor-like apps, from Photoshop to VS Code.
@tomayac @firefoxwebdevs 100% this. Used by a vast majority of Construct users to save their work when available, and so a big reason to use our PWA in Chrome rather than Firefox
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs CSS Grid Lanes
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@firefoxwebdevs File System Access API. I'd be fine if you carved out `showDirectoryPicker()`, or put it behind a scary permission prompt. It enables so many powerful editor-like apps, from Photoshop to VS Code.
@tomayac @firefoxwebdevs Definitely! File System Access allows web apps to avoid relying on online accounts (you can save and load files without the fs apis, but the experience is subpar)
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs WebGPU
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs "corner-shape" support
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs WebAuthn still doesn't work correctly for multi-device passkeys, WebUSB not being supported makes many useful applications not usable on Firefox.
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
MathML
Mathematics Rendering · Issue #1140 · web-platform-tests/interop
Description This proposal seeks to improve the success rate of the already defined MathML presentation tests https://wpt.fyi/results/mathml/presentation-markup?label=experimental&label=master&aligned (Resubmission of #787) as the problem...
GitHub (github.com)
.... because shipping 1.1MB of JavaScript on Wikipedia articles is a tough compromise.
T414055 Performance review of MathJax client-side mode
>>! @Krinkle wrote at T271001#11499253:
Phabricator (phabricator.wikimedia.org)
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MathML
Mathematics Rendering · Issue #1140 · web-platform-tests/interop
Description This proposal seeks to improve the success rate of the already defined MathML presentation tests https://wpt.fyi/results/mathml/presentation-markup?label=experimental&label=master&aligned (Resubmission of #787) as the problem...
GitHub (github.com)
.... because shipping 1.1MB of JavaScript on Wikipedia articles is a tough compromise.
T414055 Performance review of MathJax client-side mode
>>! @Krinkle wrote at T271001#11499253:
Phabricator (phabricator.wikimedia.org)
@krinkle which bits are missing in the latest versions of browsers?
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs VirtualKeyboard API:
VirtualKeyboard API - Web APIs | MDN
The VirtualKeyboard API provides developers control over the layout of their applications when the on-screen virtual keyboard appears and disappears on devices such as tablets, mobile phones, or other devices where a hardware keyboard may not be available.
MDN Web Docs (developer.mozilla.org)
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs
Reference target for cross root aria, or something like it
Declarative custom elements
DOM Parts and Template instantiation -
@ausi just to double check, you mean margin-trim, not text-box-trim?
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@gundersen would you be ok if it was behind a site permission addon? https://support.mozilla.org/en-US/kb/site-permission-add-ons
@firefoxwebdevs Yes, as long as there is a good way to detect a blocked permission, so you can reask the user or gracefully degrade the experience.
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs
inline if() CSS -
@ausi just to double check, you mean margin-trim, not text-box-trim?
@firefoxwebdevs yes, margin-trim. Safari supports it and I think Chrome is working on it too IIRC.
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? https://hacks.mozilla.org/2026/02/launching-interop-2026/#new-features
@firefoxwebdevs Missing CSS random() has previously blocked me from porting JS to CSS.
types: `random()` | Can I use... Support tables for HTML5, CSS3, etc
"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.
(caniuse.com)
