Examine source code of Beautifier

{
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{f47ac10b-58cc-4372-a567-0e02b2c3d479}",
      "strict_min_version": "42.0"
    }
  },
  "name": "Site Beautifier",
  "version": "1.0.0",
  "icons": {
    "184": "./icons/icon_184.jpg"
  },
  "description": "Beautifies www.Lichtblick.de in which useless contracts are removed from overview.",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.lichtblick.de/konto/*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ]
}