Intent to Extend Experiment: User-Agent Reduction Origin Trial

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Mike Taylor

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2022年8月2日 13:44:522022/8/2
收件人 blink-dev

Hi there,


We would like to extend the User-Agent Reduction OT again, from M104 to M106 (inclusive). The original extension expired on July 26th. We’ve heard from several partners that they would like to have more time to test the fully reduced UA string ahead of Phase 5 and Phase 6 rollouts. 


Original I2E

https://groups.google.com/a/chromium.org/g/blink-dev/c/R0xKm1B7qoQ/ 


First I2EE https://groups.google.com/a/chromium.org/g/blink-dev/c/6x6WH2Odzfo/m/FkDjee5cHQAJ 


Experiment Timeline


M103-M106 inclusive


Reason this experiment is being extended


Like the previous extension, we believe the risks for burn-in don't apply, because this OT just enables what we are planning to ship as default behavior in the future (and the OT stopped working last week).


We still have not received negative feedback or reports of breaking from OT participants, and are encouraged by that fact.


Here’s the relevant info required for OT extensions beyond 6 milestones:


Draft spec: 

TAG review:

bit.ly/blink-signals requests

  • Gecko: Shipped/Shipping. Firefox has frozen (or capped) much of their UA string already.

  • WebKit: Shipped/Shipping. Safari has already frozen everything in their UA string except for version number info.

  • Web developers: Mixed signals. Reactions have ranged from positive to indifferent to negative, from various channels.

WPT tests

  • None yet, since UAs have flexibility to diverge here. With more alignment, this may make sense in the future.


Thanks, Mike


Chris Harrelson

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2022年8月3日 11:50:272022/8/3
收件人 Mike Taylor、blink-dev
LGTM

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Victor Tan

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2022年8月9日 13:18:032022/8/9
收件人 blink-dev、Mike Taylor
Hi, 
The User-Agent Reduction Origin Trial is now live and will continue to work until Oct 18.

Bests,
Victor

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