manifest.json

 {
  "name": "MinUtube",
  "version": "1.0",
  "description": "Adds a context menu item to watch YouTube videos via its corresponding embed URL and also changes them automatically on Bing.com and Google.com pages.",
  "permissions": [
    "contextMenus",
    "webNavigation",
    "*://*.google.com/*",
    "*://*.bing.com/*",
    "*://*.youtube.com/*"
  ],
  "background": {
    "scripts": ["background.js"]
  },
  "manifest_version": 2
}