web-features consumers report for 2025-12-01

[github-actions]

Chromestatus entries

• remove-jpeg-or-png-embedded-in-bmp used by https://chromestatus.com/feature/5153489630134272 (see discussion, below)
• None used by https://chromestatus.com/feature/6552486106234880 (Add protected-audience and ad-selection features #2635)
• api.KeyframeEffect.iterationComposite used by https://chromestatus.com/feature/5198590821662720 (Add feature for animation iterationComposite (web animations) #3503)
• web-install used by https://chromestatus.com/feature/5183481574850560 (Adds the web install feature #3488)
• feature-policy used by https://chromestatus.com/feature/6294138899136512 (Add features for permissions policy and feature policy #2661)
• feature-policy used by https://chromestatus.com/feature/5190687460950016 (Add features for permissions policy and feature policy #2661)
• feature-policy used by https://chromestatus.com/feature/5694225681219584 (Add features for permissions policy and feature policy #2661)

Source: chromestatus.com

Chromium use counters

• ReferenceTarget (draft) (Add the referencetarget feature #3376)
• ScopedViewTransitions (draft) (Scoped view transitions #3423)
• WasmBranchHinting (draft) (Add Wasm Branch Hinting #2744)
• WebAppManifestUpdate (draft)
• IncomingCallNotifications (draft) (Add feature for incoming call notifications #3466)
• WebInstallAPI (draft) (Add feature for app install API #3467)
• CrashReportStorageAPIInitialize (draft) (Add feature for crash reporting storage API #3468)
• WasmCustomDescriptors (draft) (Add Wasm Custom Descriptors #3244)
• TextDetect (not draft) (Add feature for text detection API #3502)
• TranslationApi (not draft) (Add feature(s) for translator and language detector APIs #3560)

Source: webdx_feature.mojom

web-platform-tests

• mixin (Add feature for CSS mixins (@mixin, @contents, and @apply) #3465)
• viewport (Merge viewport/ into viewport-segments/ web-platform-tests/wpt#55429)
• virtual-sensor (see comment web-features consumers report for 2025-12-01 #3588 (comment) for possible fixes)

Source: WEB_FEATURES_MANIFEST.json

[ddbeck]

WPT's virtual-sensor, introduced by web-platform-tests/wpt#56202, seems like a typo of virtual-sensors. However, that feature is actually about some WebDriver commands for simulating sensors for testing. Instead, the WPT tests themselves seem to relate more closely to:

• accelerometer
• ambient-light
• gyroscope
• magnetometer
• orientation-sensor

Unfortunately, these features don't actually map the BCD keys for the API under test very well because it's unclear which feature(s) ought to own api.Sensor and api.SensorErrorEvent (without the option of overlapping keys, see #1173).

I think the right steps here are to:

• Remap WPT to the feature list above
• Change virtual-sensors's spec URL to point to the webdriver spec, if there's a more suitable target

[ddbeck]

@foolip proposed follow ups for you on this report, presented as me giving you a to-do list (sorry), reworked from the previous report:

• Chrome status entry: remove-jpeg-or-png-embedded-in-bmp used by https://chromestatus.com/feature/5153489630134272

  Proposed action: allow this entry to not have a corresponding web-features entry.

  It looks to be a non-feature, where there's unspecified behavior implemented by Chrome that's being withdrawn. Ordinarily, this might be a case for a discouraged feature, but the linked status entry says, "No usage has been registered […] Not just minimal usage, but no usage whatsoever." I love the commitment to transparency on Chrome Status, but in web-features I don't think there's any good to come from highlighting the existence of something for developers, only to tell them to not do the thing they've never done before.

• Chrome status entry: feature-policy used by https://chromestatus.com/feature/6294138899136512, https://chromestatus.com/feature/5190687460950016, and https://chromestatus.com/feature/5694225681219584

  Proposed action: Re-review Add features for permissions policy and feature policy #2661.

• Use counter: ReferenceTarget

  Proposed action: use referencetarget (added in Add the referencetarget feature #3376)

• Use counter: WebAppManifestUpdate

  Proposed action: continue to follow up as mentioned in web-features consumers report for 2025-11-01 #3494 (comment).

• WPT mapping: virtual-sensor

  Proposed action: see previous comment web-features consumers report for 2025-12-01 #3588 (comment).

[ddbeck]

Superseded by #3632.