Cast YouTube in Browser

manifest.json

{
  "manifest_version": 2,
  "name": "Cast YouTube in Browser",
  "description": "Control YouTube in your browser from your smartphone or tablet. Enables the YouTube for TV interface in your browser, which is normally blocked on desktop. YouTube TV supports casting from a mobile device.",
  "version": "1.0.0",
  "icons": {
    "16": "icons/16.png",
    "24": "icons/24.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png",
    "512": "icons/512.png"
  },
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "24": "icons/24.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "64": "icons/64.png"
    },
    "default_popup": "browserAction/index.html",
    "default_title": "Cast YouTube in Browser"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://*.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bdc2383f-16a2-459b-afba-f3fd26078085}"
    }
  }
}