I'm excited to see this ship! I see this as another important use of the PEPC technology to better enable the browser to be an effective intermediary between the site and the user. Just a few nits and questions:
On Wed, Apr 15, 2026, 10:32 a.m. Chromestatus < [email protected]> wrote: > *Contact emails* > [email protected], [email protected] > > *Explainer* > https://github.com/WICG/PEPC/blob/main/usermedia_element.md > > *Specification* > https://wicg.github.io/PEPC/permission-elements.html > > *Summary* > Usermedia Capability Element, is a declarative, user-activated control for > accessing the starting and interacting with media streams. This addresses > the long-standing problem of permission prompts being triggered directly > from JavaScript without a strong signal of user intent. By embedding a > browser-controlled element in the page, the user's click provides a clear, > intentional signal. This enables a much better prompt UX and, crucially, > provides a simple recovery path for users who have previously denied the > permission. Note: This feature was previously developed and tested in an > Origin Trial as the more generic <permission> element. Based on feedback > from developers and other browser vendors, it has evolved into > capability-specific elements to provide a more tailored and powerful > developer experience. > > *Blink component* > Public Trackers > Chromium Public Trackers > Chromium > Internals > > Permissions > PermissionElement > <https://issues.chromium.org/issues?q=customfield1222907:%22Public%20Trackers%20%3E%20Chromium%20Public%20Trackers%20%3E%20Chromium%20%3E%20Internals%20%3E%20Permissions%20%3E%20PermissionElement%22> Note that web-exposed features typically live under the 'Blink' component, and they get some extra love (like an extra expert triage rotation <https://www.chromium.org/blink/blink-triaging/>) to help ensure web devs are getting fast and helpful responses and that important externally-reported regressions don't get missed. Bugs under 'Internals' are normally assumed to not contain important externally-reported issues. As long as your team is on top of your bug triage (eg. would notice within 1-2 days if someone filed a bug there saying a change broke their website) then it's not a big deal, may not be worth the hassle of moving. Regardless, does not need to block this intent IMHO. *Web Feature ID* > permissions <https://webstatus.dev/features/permissions> Since this is a distinct feature we'd want to track usage of independently, it should have a distinct feature ID. Please file an issue here <https://github.com/web-platform-dx/web-features/issues/new?template=new-feature.yml> and just tag it as missing for now. *Motivation* > The current web permission model for interacting with user media relies on > JavaScript-triggered prompts, giving the user agent no strong signal of > user intent. This results in out-of-context prompts, user frustration, and > difficult-to-recover-from denial states. We propose the <usermedia> > element, or a suite of elements. This will be semantic HTML control with > browser-controlled content and strict styling constraints. These > constraints are fundamental to the security model, ensuring a very high > level of confidence in the user's intent when making a permission decision > at both the site and OS level. Crucially, the <usermedia> element evolves > beyond simply managing permissions; it streamlines the entire journey by > also facilitating starting and interacting with media streams. This often > eliminates the need for separate JavaScript API calls, simplifying > implementation and creating a more seamless user flow. By providing a > clear, consistent, in-page control, this element solves significant user > problems related to context blindness and "permission regret," offering a > simple recovery path from a previously denied state. The combination of a > user-initiated element and a subsequent browser-controlled confirmation UI > enhances intent capture, improves accessibility, and prevents manipulative > patterns, providing a significantly better experience for both users and > developers. > > *Initial public proposal* > https://github.com/WICG/PEPC/issues/62 > > *TAG review* > https://github.com/w3ctag/design-reviews/issues/1079 There's also a more specific review request <https://github.com/w3ctag/design-reviews/issues/1218> a couple weeks ago. Probably its the one you should list in chromestatus for this feature (and it links to the related prior ones anyway). No need to block this I2S, but of course we expect that you'll engage with any feedback that comes there in parallel. *TAG review status* > Issues addressed > > *Origin Trial Name* > UserMediaElement > > *Goals for experimentation* > This Origin Trial serves two primary purposes: ensuring continuity for > existing partners who have successfully integrated this pattern, and > providing a platform to validate and iterate on the new, > capability-specific <usermedia> element. While our previous Origin Trial > for <permission> provided strong evidence for the core user-initiated > model, feedback from developers and browser vendors prompted us to evolve > the design. This new trial is essential for gathering insights on a > refined, data-centric API shape to help us reach cross-browser consensus. > To ensure a seamless transition and prevent disruption for our valued OT > partners, this trial will initially launch with an API shape that is > functionally equivalent to the previous <permission> trial, simply using > the new <usermedia> element name. This provides a stable foundation from > which we will iterate based on further discussion. Our goal is to evolve > this element towards our proposed data-centric design ( > https://github.com/WICG/PEPC/blob/main/usermedia_element.md). However, we > recognize that this more advanced API has raised compatibility and > complexity concerns with developers ( > https://github.com/WICG/PEPC/issues/62). Therefore, a primary objective > of this trial is to work closely with the community to address these > concerns and refine the final API. TPAC WebRTC minutes > https://www.w3.org/2025/11/11-webrtc-minutes.html#551 > > *Chromium Trial Name* > UserMediaElement > > *Origin Trial documentation link* > https://github.com/WICG/PEPC/blob/main/usermedia_element.md > > *WebFeature UseCounter name* > kHTMLPermissionElement > > *Risks* > > > *Interoperability and Compatibility* > There is a risk that this feature fails to be adopted by other browsers. > This can be mitigated by backwards designing a reasonable fallback > mechanism so that the element can degrade gracefully if the it's in an > unsupported environment. > > *Gecko*: Under consideration ( > https://github.com/mozilla/standards-positions/issues/1245) > > *WebKit*: No signal > > *Web developers*: Positive > https://github.com/WICG/PEPC/issues/2#issuecomment-2393820279 > https://github.com/WICG/PEPC/issues/2#issuecomment-2393861768 > https://github.com/WICG/PEPC/issues/2#issuecomment-2393911331 > https://github.com/WICG/PEPC/issues/2#issuecomment-2619657041 > https://github.com/WICG/PEPC/issues/62#issuecomment-3482975001 > https://github.com/WICG/PEPC/issues/62#issuecomment-3482981942 > https://github.com/WICG/PEPC/issues/62#issuecomment-3498355775 > https://github.com/WICG/PEPC/issues/62#issuecomment-3513734884 > > *Other signals*: > > *Ergonomics* > No foreseen ergonomics risks. > > *Activation* > A polyfill can help developers use this feature without risking broken > functionality on non-supporting browsers. > > *Security* > https://github.com/WICG/PEPC/blob/main/explainer.md#Security > > *WebView application risks* > > Does this intent deprecate or change behavior of existing APIs, such that > it has potentially high risk for Android WebView-based applications? > Feature is not shipping on WebView due to it requiring permission manager > embedder support. > > > *Debuggability* > The element raises issues to the devtools issues panel which help > developers debug issues with their usage of the element. > > *Will this feature be supported on all six Blink platforms (Windows, Mac, > Linux, ChromeOS, Android, and Android WebView)?* > No > The element is not supported on Android WebView as it requires permission > manager support to function and the WebView permission manager defers most > permission decisions to the embedder by design. > > *Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* > Yes > https://wpt.fyi/results/html/semantics/permission-element/usermedia It looks like you have just a 50% pass rate (8/16) on the dashboard right now. Has someone done a triage pass over these failures? Perhaps some of these tests are passing in Chrome infra but failing on wpt.fyi? Getting all the tests passing doesn't need to block I2S, but we want to make sure we understand the current and likely future state of the tests since it's a proxy for maturity and spec conformance, and is really valuable for any other implementations to follow. *DevTrial instructions* > https://github.com/WICG/PEPC/blob/main/HOWTO.md#enabling-usermedia > > *Flag name on about://flags* > *No information provided* > > *Finch feature name* > UserMediaElement > > *Rollout plan* > Will ship enabled for all users > > *Requires code in //chrome?* > True > > *Tracking bug* > https://crbug.com/443013457 > > *Availability expectation* > Feature is available only in Chromium browsers. We are not aware of other > browsers adoption. > > *Adoption expectation* > Feature is used by specific partner(s) to provide functionality within 12 > months of launch in Chrome. Partners who are tested the feature in OT are > expected to continue usage. > > *Adoption plan* > We are planning to publish on developer.chrome.com and do further partner > outreach > > *Non-OSS dependencies* > > Does the feature depend on any code or APIs outside the Chromium open > source repository and its open-source dependencies to function? > No > > *Estimated milestones* > Shipping on desktop 149 > Origin trial desktop first 144 > Origin trial desktop last 148 > DevTrial on desktop 144 > Shipping on Android 149 > Origin trial Android first 144 > Origin trial Android last 148 > DevTrial on Android 144 > > *Anticipated spec changes* > > Open questions about a feature may be a source of future web compat or > interop issues. Please list open issues (e.g. links to known github issues > in the project for the feature specification) whose resolution may > introduce web compat/interop risk (e.g., changing to naming or structure of > the API in a non-backward-compatible way). > This is an MVP launch. The MVP feature is fully functional and used by > developers right now. We are working closely with the WebRTC on post-MVP > features, the open topics will based on the foundation of the MVP, that we > agreed upon with the WebRTC. Some of the open topics are for example: In > the future, we might want to add a parameter to the getUserMedia algorithm > so that the algorithm can determine whether the getUserMedia is called from > the <usermedia> element or getUserMedia API. Potential to add additional > attributes for <usermedia> interface. We're putting finishing touches on > the spec now, work-in-progress PR is here, but once that lands we want to > ship for M149 so wanted to start the discussion now. > > *Link to entry on the Chrome Platform Status* > https://chromestatus.com/feature/4926233538330624?gate=6467532078841856 > > *Links to previous Intent discussions* > Intent to Prototype: > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/692719de.050a0220.17ec37.00c3.GAE%40google.com > Intent to Experiment: > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/6942ed09.050a0220.1050d6.0961.GAE%40google.com > > > This intent message was generated by Chrome Platform Status > <https://chromestatus.com>. > > -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/69dfa184.050a0220.c8e20.03e8.GAE%40google.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/69dfa184.050a0220.c8e20.03e8.GAE%40google.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFUtAY-ADWgOsh9ReDXo80YY%3DfrAkXSnLwzPzAQG3je1q_opRg%40mail.gmail.com.
