background.js

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

'use strict';

// Simple extension to remove 'Cookie' request header and 'Set-Cookie' response
// header.

function removeHeader(headers, name) {
  for (var i = 0; i < headers.length; i++) {
    if (headers[i].name.toLowerCase() == name) {
      console.log('Removing "' + name + '" header.');
      headers.splice(i, 1);
      break;
    }
  }
}

chrome.webRequest.onBeforeSendHeaders.addListener(
  function(details) {
    removeHeader(details.requestHeaders, 'cookie');
    return {requestHeaders: details.requestHeaders};
  },
  // filters
  {urls: ['https://*/*', 'http://*/*']},
  // extraInfoSpec
  ['blocking', 'requestHeaders', 'extraHeaders']);

chrome.webRequest.onHeadersReceived.addListener(
  function(details) {
    removeHeader(details.responseHeaders, 'set-cookie');
    return {responseHeaders: details.responseHeaders};
  },
  // filters
  {urls: ['https://*/*', 'http://*/*']},
  // extraInfoSpec
  ['blocking', 'responseHeaders', 'extraHeaders']);