Examine source code of Polis Files Assistant

{
  "manifest_version": 2,
  "name": "Polis Files Assistant",
  "version": "5.0",
  "description": "Downloading - Uploading - Digital Signing files.",
  "icons": {
    "48": "icons/pdf_tr.png"
  },
  "permissions": [
    "nativeMessaging",
    "*://*/*",
    "notifications",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "km.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "polis_files_assistant@kostis.gr",
      "strict_min_version": "64.0"
    }
  },
  "options_ui": {
    "page": "options.html"
  }
}