Examine source code of GoToChannel

{
  "name": "GoToChannel",
  "version": "1.0.1",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "*://youtube.com/*",
        "*://*.youtube.com/*",
        "*://www.youtube.com/*",
        "*://youtu.be/*",
        "*://www.youtu.be/*",
        "*://*.youtu.be/*"
      ],
      "js": [
        "index.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking"
  ],
  "icons": {
    "500": "asset/logo-500.png"
  },
  "browser_action": {
    "default_icon": {
      "500": "asset/logo-500.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}