Examine source code of PDF Search Booster

{
  "manifest_version": 2,
  "name": "PDF Search Booster",
  "version": "1.0",
  "description": "Enhance search inside online PDFs.",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*.pdf"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a8ba8e9d-4b4d-4f32-a4ae-30f2098bce9e}"
    }
  }
}