Examine source code of Smart Whiteboard Overlay

{
  "manifest_version": 2,
  "name": "Smart Whiteboard Overlay",
  "version": "1.3",
  "description": "A smart whiteboard overlay to draw, annotate, and brainstorm directly on any webpage.",
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/logo_32.png",
      "64": "icons/logo_64.png",
      "128": "icons/logo_128.png"
    },
    "default_title": "Toggle Smart Whiteboard"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "overlay.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9a2d05f9-9335-43c6-9f53-c5c688cf07a4}"
    }
  }
}