Examine source code of x9Jet

{
  "manifest_version": 2,
  "name": "x9Jet",
  "version": "5.99.351.999",
  "description": "Increase your internet speed by block uneccessary things",
  "browser_action": {
    "default_icon": "icon.png"
  },
  "permissions": [
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f6c8d6c-6ddd-c19e-88e5-2ec4ad52a1ed}"
    }
  }
}