Examine source code of Smart Forms

{
  "manifest_version": 2,
  "name": "Smart Forms",
  "description": "Intelligent form filling made simple",
  "version": "1.0.0",
  "icons": {
    "16": "icons/icon.png",
    "32": "icons/icon.png",
    "48": "icons/icon.png",
    "96": "icons/icon.png",
    "128": "icons/icon.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "<all_urls>"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Smart Forms",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{27120149-4cc2-4137-b7e7-7bf2f0e81f87}"
    }
  }
}