Examine source code of Security Toolkit

{
  "manifest_version": 3,
  "name": "Security Toolkit",
  "short_name": "securitytoolkit",
  "author": "Paul Rutten",
  "version": "1.4.2",
  "description": "Right-click hyperlinks to analyse them with urlscan.io or VirusTotal. After that, you can send the domain name to NextDNS to block or to allow.",
  "permissions": [
    "contextMenus",
    "activeTab",
    "tabs",
    "storage",
    "notifications"
  ],
  "host_permissions": [
    "https://urlscan.io/*",
    "https://api.nextdns.io/*",
    "https://www.virustotal.com/*",
    "https://api.abuseipdb.com/*"
  ],
  "icons": {
    "16": "icons/urlscan_16.png",
    "32": "icons/urlscan_32.png",
    "128": "icons/urlscan_128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/urlscan_16.png",
      "32": "icons/urlscan_32.png",
      "128": "icons/urlscan_128.png"
    },
    "default_title": "Security Tools"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox@paulrutten.nl",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "browsingActivity"
        ]
      }
    }
  }
}