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Bing Chat for All Browsers Widespread Unavailability Incident (April 23誠鉉)

Bing Chat for All Browsers Widespread Unavailability Incident (April 23誠鉉)

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Over a year old. May be outdated

No longer working on Chrome (gives "Open in Microsoft Edge" window), Issue #74, anaclumos/bing-chat-for-all-browsers

The Problem

  • A lot of people can still use Bing with . Unfortunately that includes my friends, so we could not replicate it.
  • But the number of people reporting being blocked spiked.
  • Possibly Bing slowly rolling out a new kind of browser detection. We are still determining what this is at the moment.
  • Some said the Chrome/ version did not work but a manual user-agent change worked. Others said it did not. For these few users, none of the methods provided worked except native Edge.

What went wrong?

After 12 hours of investigation, I found that Bing added a somewhat proprietary header that encodes the User Agent: UserAgentReductionOptOut. After faking that as well, it now works again.

38BB75

FF32E1

What the hell, Bing...

More info: UserAgentReductionOptOut HTTP response header

What the hell, @bing

My Bing Chat extension had global unavailability for the past 12 hours. It's now fixed.

Turns out Bing wrote their proprietary header. After faking that as well, it now works again. Original Post Link

-- Sunghyun Cho (@anaclumos) April 19, 2023

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