Examine source code of Codetekt

{
  "name": "Codetekt",
  "description": "Codetekt: Gemeinsam gegen Falschinformationen!",
  "version": "0.1",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "browser_plugin@codetekt.org",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "action": {
    "default_popup": "/popup/popup.html",
    "default_icon": {
      "16": "/images/codetekt16.png",
      "32": "/images/codetekt32.png",
      "48": "/images/codetekt48.png",
      "128": "/images/codetekt128.png"
    }
  },
  "icons": {
    "16": "/images/codetekt16.png",
    "32": "/images/codetekt32.png",
    "48": "/images/codetekt48.png",
    "128": "/images/codetekt128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/images/not_found.svg",
        "/images/codetekt_banner.svg",
        "/images/article_send.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}