Examine source code of Twitch Points Grabber

{
  "name": "Twitch Points Grabber",
  "version": "2.4",
  "description": "automatic poits grabber for twitch, works with all supported langauges on twitch",
  "manifest_version": 2,
  "author": "Mene-hub",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "developer": {
    "name": "mene-hub",
    "url": "https://github.com/Mene-hub"
  },
  "icons": {
    "128": "icons/icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{36081b63-1e8c-4a93-a678-da561e7719e7}"
    }
  }
}