Examine source code of Ad-Free PDF Viewer

{
  "manifest_version": 2,
  "name": "Ad-Free PDF Viewer",
  "version": "1.0",
  "description": "Simplifies the viewing experience by removing ads from PDFs.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Ad-Free Viewer"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f880f58-087f-42c8-87a6-8a1b088d0b1b}"
    }
  }
}