Examine source code of MDN-BCD-IE

{
  "manifest_version": 2,
  "name": "MDN-BCD-IE",
  "version": "1.0.6",
  "short_name": "mdn-bcn-ie",
  "icons": {
    "16": "icons/16/16x16.png",
    "48": "icons/48/48x48.png",
    "128": "icons/128/128x128.png"
  },
  "description": "MDN浏览器兼容性IE显示插件,MDN网站不再支持显示IE的兼容性,但数据仍然存在,故可以重新显示.\"MDN browser compatibility ie display\" plugin, MDN website no longer supports displaying ie compatibility, but the data still exists, so it can be re displayed.",
  "content_scripts": [
    {
      "js": [
        "scripts/content.js"
      ],
      "matches": [
        "https://developer.mozilla.org/*/docs/Web/JavaScript/Reference/Global_Objects/*",
        "https://developer.mozilla.org/*/docs/Web/CSS/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{64c90a46-1ebb-4c02-9c28-b17712c35a6d}"
    }
  }
}