Examine source code of ProductivityFlow

{
  "manifest_version": 3,
  "name": "ProductivityFlow",
  "version": "1.0.0",
  "description": "Smart productivity timer with website tracking and focus statistics",
  "browser_specific_settings": {
    "gecko": {
      "id": "productivityflow@exdomain.com"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "ProductivityFlow"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}