This extension does not:
User preferences, including sound settings and URLs, are stored securely in the browser's local storage using Chrome's storage feature. Audio files are loaded directly from the URLs provided by the user and are not stored locally, unless the user chooses (in options) to cache them. Users can also clear the cache through the options pop-up
Local Files: Users may optionally upload their own files to play local audio. These files are stored in the browser's local storage until the user resets the settings or changes the selected file.