Guitar Tabs for YouTube

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Guitar Tabs for YouTube",
  "description": "This extension will look into the current YouTube video description section and show available guitar tabs.",
  "version": "1.0.0",
  "browser_action": {
    "default_icon": "icon_128.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "https://ajax.googleapis.com/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}