Hi Mike

Sorry, missed this new method. Is there a possibility that the Promise will 
be rejected when invoked from the extension? Thanks.

On Friday, September 10, 2021 at 1:51:05 AM UTC+5 [email protected] 
wrote:

> Hi Vladimir,
>
> Can you help me understand why the JS API (e.g., 
> `navigator.userAgentData.getHighEntropyValues(["uaFullVersion"])`) won't 
> work in a web extension?
>
> thanks,
> Mike
>
> On 9/9/21 4:48 PM, Vladimir Pastukhov wrote:
>
> *Hi, what about web extensions?*
>
> *How the extension developers are supposed to implement version-specific 
> behavior after this change? Not every feature can be easily detected by 
> testing objects for properties. Also sometimes we need the browser's full 
> version to work around bugs in particular builds. And obviously, extensions 
> can't use UA-CH * thing.
>
>
> On Wednesday, May 19, 2021 at 4:27:48 PM UTC+5 [email protected] wrote:
>
>> *Hi there blink-dev and Chromium community,*
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> * I’d like to give an update on our current thinking and plans around 
>> User-Agent Reduction (née “User Agent Freezing”) and provide a space for 
>> constructive feedback on the plans. For those looking for concrete 
>> timelines or Chrome versions—we’re not quite there yet—but will update this 
>> thread when we feel more confident on timing. What we can say at this time 
>> is that no UA string changes are coming to the stable channel of Chrome in 
>> 2021. The last major update we had on the topic was approximately a year 
>> ago 
>> <https://groups.google.com/a/chromium.org/g/blink-dev/c/-2JIRNMWJ7s/m/u-YzXjZ8BAAJ>,
>>  
>> where we announced a pause for two reasons: 1) the desire to not create an 
>> inconvenient migration burden on the web ecosystem during the early days of 
>> the COVID pandemic, and 2) to allow us to ship the User-Agent Client Hints 
>> API <https://web.dev/user-agent-client-hints/>(UA-CH), which is our 
>> proposed replacement for UA string-based content negotiation and 
>> detection.  It took slightly longer than anticipated (due to unforeseen web 
>> compatibility issues 
>> <https://bugs.chromium.org/p/chromium/issues/detail?id=1149575#c2>), but 
>> UA-CH has been shipping and enabled 
>> <https://www.chromestatus.com/feature/5995832180473856> by default since 
>> M89. We’re also starting the roll-out of both Client Hints Reliability 
>> mechanisms (Critical-CH <https://chromestatus.com/feature/5727177800679424> 
>> & ACCEPT_CH <https://chromestatus.com/feature/5555544540577792>) to address 
>> use cases where hints are needed on the first request and hope for those 
>> features to be enabled in Chrome by default in M91 (note that some 
>> server-side work may need to be done by sites to take advantage of 
>> ACCEPT_CH). We also have proposed some UA-CH API updates 
>> <https://groups.google.com/a/chromium.org/g/blink-dev/c/dafizBGwWMw/m/72l-1zm6AAAJ>
>>  
>> we would like to prototype and ship. High-level Plan We intend to proceed 
>> with UA Reduction as follows: 1. Beginning in M92, start sending 
>> deprecation/reduction notices for the navigator.userAgent, 
>> navigator.appVersion, and navigator.platform getters in the DevTools Issues 
>> tab <https://developer.chrome.com/docs/devtools/issues/>. 2. In the coming 
>> weeks, we will send an Intent to Experiment to announce an Origin Trial 
>> (OT) for sites to opt into a Reduced UA String so that we can get feedback 
>> on the feasibility and compatibility of our desired end state. We expect to 
>> run an OT for at least 6 months to provide plenty of time for sites to opt 
>> in, test, and provide feedback. 3. Evaluate feedback from OT partners and 
>> the community, and based on this feedback proceed to Phases 3 through 7 of 
>> our plan (see next section for details), giving the ecosystem plenty of 
>> time to adapt in between them. Otherwise, reconsider the best course of 
>> action depending on feedback. 4. For sites with complex use cases that 
>> require more time for migration, we aim to offer the ability to extend the 
>> current User-Agent behavior for at least an additional 6 months (through a 
>> reverse Origin Trial). Proposed changes We think it's best to roll this out 
>> slowly and incrementally in 7 Phases, pending Origin Trial feedback. As 
>> mentioned previously, we hope to publish an update soon on proposed timing 
>> and milestones for each of these Phases: Reduction Preparation Phase 1: 
>> Warn about accessing navigator.userAgent, navigator.appVersion, and 
>> navigator.platform in DevTools Phase 2: Launch an Origin Trial for sites to 
>> opt into the final reduced UA string for testing and feedback, for at least 
>> 6 months. Reduction Rollout Phase 3: Launch a reverse Origin Trial, for 
>> instances where a site may need more time for migration, for at least 6 
>> months. Phase 4: Ship reduced Chrome MINOR.BUILD.PATCH version (“0.0.0”). 
>> Once rolled-out, the reduced UA string would apply to all page loads on 
>> desktop and mobile OSes that do not opt into the reverse OT. Phase 5: Begin 
>> roll-out of reduced Desktop UA string and navigator.platform. Once 
>> rolled-out, the reduced UA string would apply to all page loads on desktop 
>> OSes that do not opt into the reverse OT. Phase 6: Begin roll-out of 
>> reduced Android Mobile (and Tablet) UA string and navigator.platform.  Once 
>> rolled-out, the reduced UA string would apply to all page loads on Android 
>> that do not opt into the reverse OT. Reduction Completion Phase 7: reverse 
>> OT ends and all page loads receive the reduced UA string. See the reference 
>> page on chromium.org <https://www.chromium.org/updates/ua-reduction> which 
>> details all the actual User-Agent/navigator.userAgent changes at each 
>> phase, as well as values for navigator.platform and navigator.appVersion. 
>> Note: We have no plans to change the User-Agent string on Android WebView 
>> or Chrome for iOS at this time, but will make public updates if and when 
>> that changes. We realize that these proposed changes have raised many valid 
>> questions and concerns, and we appreciate the feedback we’ve gotten thus 
>> far. Please keep the feedback coming! As we continue to discuss the 
>> proposal, we ask everyone to be mindful of the Chromium Code of Conduct 
>> <https://chromium.googlesource.com/chromium/src/+/master/CODE_OF_CONDUCT.md>.
>>  
>> Thanks, Mike *
>>
>

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