Examine source code of JSON Toolkit

{
  "manifest_version": 3,
  "name": "JSON Toolkit",
  "description": "manifest.json description",
  "version": "1.0.1.0",
  "icons": {
    "16": "icon@16px.png",
    "48": "icon@48px.png",
    "128": "icon.png"
  },
  "action": {
    "default_title": "JSON Toolkit"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4bc1e4d2-d8ee-4998-8af8-3b425537e664}",
      "strict_min_version": "102.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}