Examine source code of Stowaway Tabs – Tab Saver with Auto-Backup

{
  "manifest_version" : 3 ,
  "name" : "Stowaway Tabs – Tab Saver with Auto-Backup",
  "short_name" : "Stowaway",
  "version" : "0.1.2",
  "description" : "Save and restore tabs, recover closed windows and never lose a session. Automatic snapshots and backups, stored locally.",
  "icons" : {
    "16" : "icons/icon-16.png",
    "32" : "icons/icon-32.png",
    "48" : "icons/icon-48.png",
    "128" : "icons/icon-128.png"
  },
  "action" : {
    "default_popup" : "popup.html",
    "default_title" : "Stowaway Tabs",
    "default_icon" : {
      "16" : "icons/icon-16.png",
      "32" : "icons/icon-32.png"
    }
  },
  "permissions" : [
    "tabs" ,
    "storage" ,
    "unlimitedStorage" ,
    "alarms" ,
    "downloads" 
  ],
  "commands" : {
    "save-window": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      },
      "description" : "Save the current window"
    },
    "_execute_action": {
      "description" : "Open the Stowaway Tabs popup"
    }
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ],
    "type" : "module" 
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "stowaway-tabs@newperk.ltd",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}