Examine source code of Auto Tab Reload

{
  "manifest_version": 3,
  "name": "Auto Tab Reload",
  "version": "3.0.0",
  "description": "Automatically refresh tabs with advanced features: scheduling, smart reload detection, domain management, and keyboard shortcuts.",
  "permissions": [
    "tabs",
    "storage",
    "notifications",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "256": "icon.png"
    }
  },
  "icons": {
    "256": "icon.png"
  },
  "commands": {
    "toggle-reload-tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+R",
        "mac": "Command+Shift+R"
      },
      "description": "Toggle automatic reload for the current tab (default 5 min)"
    },
    "toggle-reload-all-tabs": {
      "suggested_key": {
        "default": "Ctrl+Shift+A",
        "mac": "Command+Shift+A"
      },
      "description": "Toggle automatic reload for all tabs"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "niteeshsr.f6@gmail.com"
    }
  }
}