Incorrect user agent in Windows 10

[JasonLP]

I am looking at a bug report where a customer has noticed that the operating system is being misidentified because of a mistake in the user agent string.

I'm able to reproduce this, using my app build with CEF-32 bit for Windows, running on Windows 10. The user agent string looks like this:

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Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36

On the same machine, running Chrome 64-bit, the user agent string looks like this:

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Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36

Why does my CEF application running on Windows 10 think it's running on Windows 8.1 (i.e. Windows NT 6.3)

Thanks,
-Jason-

[magreenblatt]

How does it behave in the cefclient sample application?

[JasonLP]

How does it behave in the cefclient sample application?

Correctly:

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Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36

[amaitland]

Does your app have an app.manifest with the relevant compatibility entries?

[JasonLP]

Does your app have an app.manifest with the relevant compatibility entries?

Ah, no. This is very likely the culprit. Thank you!

[rjxray]

I have the same issue.
How exactly did you resolve it?
I tried copying the cefclient compatibility.manifest over the existing one in my app's win folder but that made no difference.

[amaitland]

Add an application manifest to your project using Visual Studio.

Then add the compatibility entries (they're usually included in the default just commented out)

[rjxray]

Thanks, I ended up adding this to my cmake post build events
mt.exe -nologo -manifest "$(ProjectDir)bin/win/$(ProjectName)$(TargetExt).manifest" "$(ProjectDir)/bin/win/compatibility.manifest" -outputresource:"$(OutDir)$(TargetName)$(TargetExt)"\\;1