Examine source code of JSON[B] Viewer

{
  "name": "JSON[B] Viewer",
  "version": "3.0.0",
  "manifest_version": 3,
  "author": "JSON[B] <support@jsonb.online>",
  "description": "JSON[B] is a web-based online editor for viewing, editing, formatting, transforming, and comparing JSON documents.",
  "homepage_url": "https://www.jsonb.online",
  "icons": {
    "16": "assets/icons/16.png",
    "32": "assets/icons/32.png",
    "48": "assets/icons/48.png",
    "96": "assets/icons/96.png",
    "128": "assets/icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "assets/js/viewer.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "*://*/*",
    "<all_urls>"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; frame-src 'self' https://www.jsonb.online"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "viewer@jsonb.online",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "usage": "This extension does not collect any user data or personal information."
      }
    }
  }
}