Examine source code of Hours Ago Calculator

{
  "manifest_version": 3,
  "name": "Hours Ago Calculator",
  "description": "Quickly convert a number of hours into a timestamp (\"X hours ago\") and convert timestamps to hours ago.",
  "version": "1.0.0",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hoursago-calculator@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "collects_data": false,
        "reason": "This extension does not collect, store, or transmit any user data."
      }
    }
  }
}