title: How Mega downloads a file?
body: <p>when you download a file from MEGA service, a web page to display a download progress bar will appear. After the bar reaches 100%, your browser will notify users to save the file into a selected folder. I know that Mega use HTML5 FileSystem API to do this (<a href="https://stackoverflow.com/questions/15994554/download-files-like-mega-co-nz">Download files like mega.co.nz</a> ). However, i don't know when the file is completely downloaded into the sandboxed directory, how the browser's instructed to notify users about the download? Would you please answer my question? Thanks in advance.</p>