Examine source code of Screen Watch Timer

{
  "manifest_version": 3,
  "name": "Screen Watch Timer",
  "version": "1.1.2",
  "description": "A minimalist, professional screen time tracker with repeating 10-minute break alerts.",
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "screen-timer-v1-x92k@yourname.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}