Examine source code of Flexible Timers Activity

{
  "manifest_version": 3,
  "name": "Flexible Timers Activity",
  "version": "1.1.0",
  "description": "Reports the active tab URL/title to the Flexible Timers Pro app for on-device activity tracking.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "nativeMessaging",
    "alarms"
  ],
  "host_permissions": [
    "http://127.0.0.1:5613/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "flexibletimers-activity@xintechllc.com",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  }
}