LGTM to extend experimentation M113-M115 (inclusive)

On Fri, Apr 14, 2023 at 9:22 PM John Delaney <johni...@chromium.org> wrote:

> Hi Mike,
>
> Happy to give an update on each of these points:
>
> Each API is continuing to make progress on draft specs. All early
> specifications have been published and each API is currently working on
> iterating on more recent changes based on feedback.
>
>    -
>
>    Attribution Reporting -
>    https://wicg.github.io/attribution-reporting-api/
>    -
>
>    Fenced Frames - https://wicg.github.io/fenced-frame/
>    -
>
>    Fledge - https://wicg.github.io/turtledove/
>    -
>
>    Private Aggregation -
>    https://patcg-individual-drafts.github.io/private-aggregation-api/
>    -
>
>    Shared Storage - https://wicg.github.io/shared-storage/
>    -
>
>    Topics - https://patcg-individual-drafts.github.io/topics/
>
>
>
> TAG review requests have been made for each of the API's, except for
> Private Aggregation which is a work in progress.
>
>    -
>
>    Topics-
>    https://github.com/w3ctag/design-reviews/issues/726#issuecomment-1379908459
>    -
>
>    Shared Storage - https://github.com/w3ctag/design-reviews/issues/747
>    -
>
>    Fenced Frames-
>    https://github.com/w3ctag/design-reviews/issues/735#issuecomment-1226822420
>    -
>
>    FLEDGE -
>    https://github.com/w3ctag/design-reviews/issues/723#issuecomment-1481081377
>    -
>
>    ARA - https://github.com/w3ctag/design-reviews/issues/724
>
>
> We are currently looking at re-filing / updating these requests to include
> recent changes, as some of these requests were made some time ago.
>
> bit.ly/blink-signals requests are ongoing and are expected to finish in
> the next couple of weeks. We have already started receiving feedback on
> some APIs.
>
>    -
>
>    Attribution Reporting & Fenced Frames - still in progress
>    -
>
>    Fledge:
>    -
>
>       Mozilla: https://github.com/mozilla/standards-positions/issues/770
>       -
>
>       Webkit: https://github.com/WebKit/standards-positions/issues/158
>       -
>
>    Private Aggregation - Private Aggregation is covered in both the
>    Shared Storage and FLEDGE request.  We have not requested separate vendor
>    signals for Private Aggregation.
>    -
>
>    Shared Storage
>    -
>
>       Mozilla: https://github.com/mozilla/standards-positions/issues/646
>       -
>
>       Webkit: https://github.com/WebKit/standards-positions/issues/10
>       -
>
>    Topics
>    -
>
>       WebKit:
>       
> https://github.com/WebKit/standards-positions/issues/111#issuecomment-1359609317
>       -
>
>       Mozilla:
>       
> https://github.com/mozilla/standards-positions/issues/622#issuecomment-1372979100
>
>
> WPT tests are ongoing, many are completed with sufficient coverage.
> Private Aggregation has not begun yet.
>
>    -
>
>    Attribution Reporting-
>    
> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/wpt_internal/attribution-reporting/
>    -
>
>    Fenced Frames -
>    
> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/wpt_internal/fenced_frame/
>    -
>
>    Fledge-
>    https://wpt.fyi/results/fledge?label=experimental&label=master&aligned
>    -
>
>    Shared Storage -
>    
> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/wpt_internal/shared_storage/?q=shared_storage%20wpt&ss=chromium
>    -
>
>    Topics -
>    https://wpt.fyi/results/?label=master&label=experimental&aligned&q=topics
>
>
>
> If you have questions on specific areas here, let me know and I can
> provide any additional details/context.
>
> Thanks!
>
> On Thu, Apr 13, 2023 at 11:03 AM Mike Taylor <miketa...@chromium.org>
> wrote:
>
>> Hi John,
>>
>> Could you comment on any additional progress made in the 5 required areas
>> for OT extensions (see
>> https://www.chromium.org/blink/launching-features/#origin-trials)?
>>
>> thanks,
>> Mike
>> On 4/12/23 5:44 PM, John Delaney wrote:
>>
>> Greetings,
>>
>> We would like to extend the origin trial for all of the Privacy Sandbox
>> Ads APIs including: Topics, FLEDGE, Private Aggregation, Fenced Frames,
>> Attribution Reporting, and Shared Storage.
>>
>> We are sending a single intent for the extension because the rationale is
>> shared among the APIs.
>>
>> *Contact emails*
>> johni...@chromium.org, jkar...@chromium.org, pauljen...@chromium.org,
>>
>> *Explainer*
>> Attribution Reporting:
>> https://github.com/WICG/attribution-reporting-api/blob/main/EVENT.md and 
>> https://github.com/WICG/attribution-reporting-api/blob/main/AGGREGATE.md
>>
>> Fenced Frames: https://github.com/WICG/fenced-frame/tree/master/explainer
>> FLEDGE: https://github.com/WICG/turtledove/blob/master/FLEDGE.md
>> Shared Storage: https://github.com/WICG/shared-storage
>> Private Aggregation:
>> https://github.com/patcg-individual-drafts/private-aggregation-api
>> Topics API:
>> https://github.com/patcg-individual-drafts/topics/blob/main/README.md
>>
>> *Summary*
>> A collection of APIs to facilitate advertising: Attribution Reporting,
>> Fenced Frames, FLEDGE, Private Aggregation, Shared Storage and Topics.
>>
>> *Link to “Intent to Experiment” blink-dev discussion*
>> Attribution Reporting:
>>
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/jEnNpideO1Y/m/nlEDdjmnCgAJ
>> Fenced Frames:
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/y6G3cvKXjlg/m/DSNrBtxyAgAJ
>> FLEDGE:
>>
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/0VmMSsDWsFg/m/_0T5qleqCgAJ
>> Private Aggregation:
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/576sXtXNeCA
>> Shared Storage:
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/jDx8z5a6ovk/m/H6w1UO-uBAAJ
>> Topics API: 
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/oTwd6VwCwqs/m/jPkW3T-mCgAJ
>>
>>
>> Unified OT Thread:
>>
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/Vi-Rj37aZLs/m/wzeBWfxxEgAJ
>>
>> *Goals for experimentation*
>> Unchanged.
>>
>> *Experimental timeline*
>> We'd like to extend the origin trial for 3 additional milestones, with
>> the extension starting in 113 continuing through Chrome 115. The experiment
>> is therefore running from Chrome 101 through 115. We previously requested
>> an extension from Chrome 110 - 113 here
>> <https://groups.google.com/a/chromium.org/g/blink-dev/c/gpmaOi3of_w/m/SyMclFhMAAAJ>
>> .
>>
>> *Any risks when the experiment finishes?*
>> The unified origin trial is only available for a subset of Chrome users,
>> and requires developers to perform feature detection to use the APIs.
>>
>> *Reason this experiment is being extended*
>> We received feedback from developers resulting in the need for continued
>> testing and addressing several points of feedback that required changes to
>> the APIs. The extension will allow the ecosystem more time in stable
>> channels to continue their experiments. We additionally added individual
>> isolated experiments for each of the Privacy Sandbox APIs, an extension
>> will allow us to understand individual metrics outside of our existing
>> unified experiment
>>
>> These improvements include, but are not limited, to the following:
>>
>> Attribution Reporting
>>
>>    - Various bug fixes & utility improvements
>>    - Test cross app and web measurement
>>    - Additional debugging capabilities including source success debug
>>    reports
>>    
>> <https://github.com/WICG/attribution-reporting-api/blob/main/verbose_debugging_reports.md#source-success>
>>
>>
>> Fenced Frames
>>
>>    - Limited feedback so far
>>    - FencedFrameConfig
>>    
>> <https://github.com/WICG/fenced-frame/blob/master/explainer/fenced_frame_config.md>
>>    API surface and supporting size for FLEDGE
>>    <https://github.com/WICG/turtledove/pull/417>
>>    - reportEvent dev tools support, support for ARA
>>    
>> <https://github.com/WICG/turtledove/blob/main/Fenced_Frames_Ads_Reporting.md#support-for-attribution-reporting>
>>    and for component ads
>>    <https://github.com/WICG/turtledove/issues/332#issuecomment-1416224808>
>>
>>
>> FLEDGE
>>
>>    - Improve latency (e.g. parallelization of FLEDGE auction support,
>>    more timeout support, more latency reporting)
>>    - Origin Trial Support (e.g. better integration with Private
>>    Aggregation API, k-anonymity testing, misc features)
>>
>>
>> Private Aggregation (OT started in M107)
>>
>>    - Adding support for a “context ID” to support report verification
>>    within Shared Storage worklets
>>
>>
>> Shared Storage SelectURL
>>
>>    - Replaced k-anon requirement with lower entropy limits during
>>    initial phase
>>    - Would like to have feedback from additional testers.
>>
>>
>> Topics
>>
>>    - General utility improvements (filtering is less restrictive without
>>    loss of privacy)
>>    - Performance optimizations (topics can be sent via headers in fetch
>>    and subframe navigation requests rather than creating an iframe and 
>> calling
>>    javascript)
>>
>>
>> Feedback from the ecosystem will continue to influence the evolution of
>> the APIs.
>>
>> *Ongoing technical constraints*
>> Please see each API's initial Intent to Experiment.
>>
>> *Will this feature be supported on all five Blink platforms supported by
>> Origin Trials (Windows, Mac, Linux, Chrome OS, and Android)?*
>> Please see each API's initial Intent to Experiment.
>>
>> *Link to entry on the feature dashboard*
>> Attribution Reporting: https://chromestatus.com/feature/6412002824028160
>> Fenced Frames: https://chromestatus.com/feature/5699388062040064
>> FLEDGE: https://chromestatus.com/feature/5733583115255808
>> Private Aggregation: https://chromestatus.com/feature/5743412790689792
>> Shared Storage: https://chromestatus.com/feature/6256348582903808
>> Topics: https://chromestatus.com/feature/5680923054964736
>>
>> Unified Feature Dashboard:
>> https://chromestatus.com/feature/5100526168440832
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