About this extension

Add and modify the HTTP request headers and response headers.

What can ModHeader do?

Add / modify / remove request headers and response headers (you can use this to set X-Forwarded-For, Authorization, Access-Control-Allow-Origin: *)
Conditionally enable header modification based on URL and/or resource type
Add comments to header
Multiple different profiles
Sorting headers and name, value, or comments
Append value to existing request or response header
Export and import header
Clone profile
Cloud backup
Customizable profile badge
Support "undo" if you made a mistake
Redirect URL with another

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