Google chrome extension chrome中未定义chrome.webRequest

我无法在chrome版本25.0.1364.160 Ubuntu 12.10 25.0.1364.160-0ubuntu0.12.10.1上使用chrome.webRequest。我在尝试访问其方法时遇到一个未定义的错误。它甚至没有加载到chrome名称空间中。以下是我的代码和配置：

Manifest.json：

{
  "manifest_version": 2,
  "name": "My Extension",
  "description": "....",
  "version": "0.9",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "index.html"
  },
  "permissions": [
    "experimental",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": ["index.js"],
    "persistent": true
  }
}

输出：

Object
Event: function (opt_eventName, opt_argSchemas, opt_eventOptions) {
app: Object
appNotifications: Object
bookmarks: Object
browserAction: Object
commands: Object
csi: function () { native function GetCSI(); return GetCSI();}
devtools: Object
extension: Object
i18n: Object
infobars: Object
loadTimes: function () { native function GetLoadTimes(); return GetLoadTimes();}
management: Object
omnibox: Object
pageAction: Object
permissions: Object
runtime: Object
scriptBadge: Object
searchBox: Object
tabs: Object
test: Object
tld: Object
types: Object
windows: Object
__proto__: Object

---

进入chrome://flags/ 并启用实验性扩展API。重新启动浏览器。

WebRequestAPI不是实验性的。为什么要申请实验许可？疑难解答步骤。你的评论与这个问题无关。此外，我已经弄明白了…chrome.webRequest API已经存在很长时间了。您遇到的问题可能与此API无关。如果实验API被禁用，则使用实验权限的扩展如果作为crx文件安装，则预期将失败而根本不会加载。

Object
Event: function (opt_eventName, opt_argSchemas, opt_eventOptions) {
app: Object
appNotifications: Object
bookmarks: Object
browserAction: Object
commands: Object
csi: function () { native function GetCSI(); return GetCSI();}
devtools: Object
extension: Object
i18n: Object
infobars: Object
loadTimes: function () { native function GetLoadTimes(); return GetLoadTimes();}
management: Object
omnibox: Object
pageAction: Object
permissions: Object
runtime: Object
scriptBadge: Object
searchBox: Object
tabs: Object
test: Object
tld: Object
types: Object
windows: Object
__proto__: Object