While we don’t yet have exact dates and milestones to announce for the planned User-Agent string reduction changes, we’re ready to resume our efforts on this front. We’ve also started the roll-out of both Client Hints Reliability mechanisms ( Critical-CH & ACCEPT_CH) to address use cases where hints are needed on the first request. UA-CH is now shipping by default in Chrome (since M89). Since then, we’ve spent a lot of time gathering valuable feedback from the ecosystem, proposing ergonomic improvements to the User-Agent Client Hints API (UA-CH)-our proposed replacement for content negotiation and detection-as well as making web compatibility fixes. Shortly after, we made the decision to put this effort on pause so as not to create an additional migration burden on the web ecosystem in the early days of the COVID-19 pandemic. September 14, 2021: Updated timeline and origin trial announced.Ī little over a year ago we announced our plans to reduce the granularity of information available from the User-Agent string, which is sent by default for every HTTP request.
