Examine source code of Delete Memory Websites

{
  "manifest_version": 2,
  "name": "Delete Memory Website",
  "version": "1.0",
  "description": "Quickly delete browsing history for a specific website.",
  "icons": {
    "48": "icons/icon.png"
  },
  "permissions": [
    "history",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_popup": "popup/popup.html",
    "default_title": "Delete Memory Website"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1ecd356-845c-4b46-b255-840cc1e3ba11}"
    }
  }
}