Examine source code of Study Tool

{
  "manifest_version": 3,
  "name": "Study Tool",
  "version": "1.1",
  "description": "Helps you study",
  "permissions": [],
  "host_permissions": [
    "*://*/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.ico",
      "48": "icon.ico"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f857892a-0135-414d-8325-8fac80cf94d2}"
    }
  },
  "icons": {
    "48": "icon.ico"
  }
}