Examine source code of PDF Split & Merge

{
  "manifest_version": 2,
  "name": "PDF Split & Merge",
  "icons": {
    "128": "Logo.png"
  },
  "version": "1.0",
  "author": "Nikhil Verma",
  "description": "Split and merge PDFs offline using pdf-lib.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{3b872a51-fe05-4b5e-8529-20b7abd7a354}"
    }
  },
  "browser_action": {
    "default_title": "Open PDF Tools"
  }
}