Examine source code of Focus-helper-shivam

{
  "manifest_version": 3,
  "name": "ADHD Focus",
  "version": "1.0.0",
  "description": "Focus timers and ADHD reminders for watching online lectures.",
  "browser_specific_settings": {
    "gecko": {
      "id": "adhd-focus@shivampatangeofentc.gmail.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/icon.svg",
    "default_title": "ADHD Focus"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*"
      ],
      "js": [
        "content/overlay.js"
      ],
      "css": [
        "content/overlay.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/icon.svg"
  }
}