Plugin for WD Readyview in a Browser

When access readyview with a browser - the browser tells me it needs a plugin to display the cameras. What plugin do I load ? (Firefox, IE, and Chrome all have the same message)

I found it does not work with Firefox. With IE I was prompted to add a plugin, after which it worked fine.

IE seems to be the only browser that will allow you to download the plugin, the plugin downloads from the NVR.

use internet explorer not edge