Examine source code of Quote Generator

{
  "manifest_version": 2,
  "name": "Quote Generator",
  "version": "1.1.0",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "app.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icon/quote.png",
    "default_popup": "index.html",
    "default_title": "Quote Generator"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0510db72-cd3e-4e17-a4d5-f65a52f9f433}"
    }
  }
}