Extensions Docs Server: Intro data source

chrome/common/extensions/docs/server2/templates/intros/webRequest.html

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 <p id="classSummary">
 Use the <code>chrome.webRequest</code> module to intercept, block,
 or modify requests in-flight and to observe and analyze traffic.
 </p>
 <h2 id="manifest">Manifest</h2>
 <p>You must declare the "webRequest" permission in the <a
   href="manifest.html">extension manifest</a> to use the web request
 API, along with <a href="manifest.html#permissions">host permissions</a>
 for any hosts whose network requests you want to access. If you want to
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       }
     }
     return {requestHeaders: details.requestHeaders};
   },
   {urls: ["&lt;all_urls&gt;"]},
   ["blocking", "requestHeaders"]);
 </pre>
 <p> For more example code, see the <a href="samples.html#webrequest">web request
 samples</a>.</p>
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