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Add HTTP Client-Hint headers to outgoing requests

Extension to allow Client-Hints header to be set for testing / experimentation purposes. Client-Hints (CH-*:) HTTP Header is proposed as a way of allowing browsers to communicate details of screen height, width and display pixel ratio to servers so that the server can return resources, especially images, that are optimised. See for more on the Client-Hints proposal Source code for extension can be found on GitHub - pull requests welcomed.

2 out of 53 ratings

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Galen Wright-WatsonJul 13, 2022

Sends only the DPR (device pixel ratio) hint, which is deprecated, and none of the other client hints, such as user-agent hints or network hints. Additionally, causes cross-origin CORS errors on subdomains (which aren't actually cross-origin).

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Ed ThurgoodNov 12, 2013

Helpful for checking out Client Hints concept. Seems to work fine for me

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Richard PerssonOct 2, 2013

It doesn't work, so not sure why it is posted as an extension?

1 person found this review to be unhelpful


  • Version
  • Updated
    November 2, 2013
  • Offered by
    Andy Davies
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