Search Play Music from Youtube

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Search Play Music from Youtube",
  "description": "When watching a music video on Youtube, a link to Google Play Music search is included. Great for All Access customers.",
  "version": "0.0.1",
  "background": {
    "persistant": true,
    "page": "background.html"
  },
  "permissions": [
    "tabs",
    "*://*.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/watch*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}