Web Browser Version for TVT NVR/Cameras

Many TVT NVR Camera systems require a plugin to be run in the browser to access their webpage and cameras from a computer. Plugins like this are now considered 'dangerous' and so modern browsers no longer have this type of plugin functionality.
The latest Mozilla Firefox version to have this functionality is  51.0.1, 32bit  (since the plugins from the NVR webpage are 32bit):
(Also don't forget to turn off Auto-Update: under Preferences, Advanced, Updater)