TypeError: browser.webRequest is undefined

Question

我正在尝试使用 webextension 记录错误。我从以下简单示例开始：

manifest.json:

{

  "manifest_version": 2,
  "name": "testOnErrorWebex",
  "version": "1.0",

  "description": "Adds a red border to all webpages matching mozilla.org.",

  "icons": {
    "48": "icons/border-48.png"
  },

  "content_scripts": [
    {
      "matches": ["<all_urls>"],
      "js": ["testOnErrorWebex.js"]
    }
  ],

  "permissions": [
  "webRequest"
]

}

并且，内容脚本：testOnErrorWebex.js

console.log("-- inside js file --");

var target = "<all_urls>"; 

/*
e.g., with no network:
"https://developer.mozilla.org/en-US/"
NS_ERROR_NET_ON_RESOLVED in Firefox
net::ERR_INTERNET_DISCONNECTED in Chrome
*/

function logError(responseDetails) {
  console.log("-- inside logError  --");
  console.log("inside logError");
  console.log(responseDetails.url);
  console.log(responseDetails.error);
}

browser.webRequest.onErrorOccurred.addListener(
  logError,
  {urls: [target]}
);

当我尝试扩展并加载它时，输入任何会引发错误的错误 URL：例如，https://doesnotexist/

打印内容脚本中的以下行：

-- inside js file --

但我得到了这个错误：

TypeError: browser.webRequest is undefined

Answer 1

browser.webRequest 在内容脚本中不可用。请尝试在后台将 testOnErrorWebex.js 更改为运行，您可以在以下更改后的清单中找到：

{

  "manifest_version": 2,
  "name": "testOnErrorWebex",
  "version": "1.0",
  "description": "Adds a red border to all webpages matching mozilla.org.",
  "background": {
    "scripts": ["testOnErrorWebex.js"]
  },
  "permissions": [
    "webRequest"
  ]
}

TypeError: browser.webRequest is undefined

TypeError: browser.webRequest is undefined

firefox-addon-webextensions