I have a Windows 7 PC that I would like to remote control the desktop of using Firefox 28 (running on Windows XP) across the internet. Is there anything that makes this possible? The Windows XP machine I have limited control of so can not install thick client software.

Ideally the solution would also allow remote control from Android devices.


2 Answers 2


You can use UltraVNC:

  • Same constraints as with TightVNC – or is it e.g. more secure? Sending passwords plain-text via HTTP would be a no-go for sensitive environments.
    – Izzy
    Mar 30, 2015 at 6:16

You can use TightVNC:

Using a Web Browser as a Viewer

The VNC servers also contain a small Web server. If you connect to it with a web browser, the Java version of the viewer will be downloaded automatically, allowing you to access the remote desktop. Obviously, your Web browser must support Java applets. Also, you should not use a proxy, to let the Java applet access the remote server directly.

The server listens for HTTP connections on port 5800 + display number. (Remember a WinVNC machine defaults to the display 0.) So to connect to the display 2 on machine "myhost", you would point your web browser at: http://myhost:5802/ . The applet will prompt you for your password, and should then display the desktop.


  • your password is sent in plain text (HTTPS is not used). RealVNC Viewer for Google Chrome is much better in that respect (all communications are encrypted using 128-bit AES technology, so your connection cannot be intercepted or spied upon. For connections to Enterprise, ultra-secure 256-bit AES is available.).
  • Sending passwords plain-text via HTTP would be a no-go for sensitive environments. If I remember correctly, one could setup a connection via SSH with TightVNC (quite a while ago I've used it last); but I've no idea whether and how that would work for web-based access...
    – Izzy
    Mar 30, 2015 at 6:17

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