Examine source code of Examzone Webcheck

{
  "description": "Examzone Webcheck",
  "manifest_version": 2,
  "name": "Examzone Webcheck",
  "version": "0.1.6",
  "author": "Lukas Diener",
  "content_security_policy": "default-src 'self'; connect-src 'self' https://admin.examzone.ch http://localhost:3000;",
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/examzone16.png",
      "32": "icons/examzone32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "examzone-webcheck@code-fabrik.ch",
      "strict_min_version": "55.0"
    }
  },
  "externally_connectable": {
    "matches": [
      "*://*.examzone.ch/*",
      "*://localhost/*"
    ]
  },
  "web_accessible_resources": [
    "src/overlay/notification.html",
    "src/overlay/overlay.html",
    "src/overlay/overlay.css"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.examzone.ch/*",
        "*://localhost/*"
      ],
      "js": [
        "src/hook.js"
      ]
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/overlay/overlay.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ]
}