manifest.json

{
  "name": "Music Plus for Google Play Music",
    "version": "0.4.13",
    "manifest_version": 2,

    "description": "Music Plus adds controls, notifications, Last.fm support, downloading, global keyboard shortcuts, and lyrics to Google Play Music.",
    "icons": { "16" : "images/music_plus.16.png",
      "48" : "images/music_plus.48.png",
      "96" : "images/music_plus.96.png"},
    "homepage_url": "http://adampash.com/",
    "content_scripts": [
    {
      "matches": ["http://*/*", "https://*/*"],
      "css": ["styles/mystyles.css"],
      "run_at": "document_end",
      "js": [
        "scripts/jquery-2.0.js",
        "scripts/jquery.hotkeys.js",
        "scripts/contentChange.js",
        "scripts/track.js",
        "scripts/lyrics.js",
        "scripts/myscript.js",
        "scripts/shortcuts.js",
        "scripts/scrobble.js"
        ]
    }
  ],
    "background":
    {
      "page": "background.html"
    },
    "permissions": [
      "history",
      "tabs",
      "<all_urls>",
      "notifications"
      ],
    "browser_action": {
      "default_icon": "images/music_plus.rounded.34.png",
      "default_title": "Google Play Music",
      "default_popup": "popup.html"
    },
    "options_page": "options.html"
}