On adding the plugin we noted that it wasnt showing in the pane

on looking at the debugging console in Firefox we see the the following error

TypeError: plugins.queuepausedcounter is undefined

and looking at the Jquery debugger we see the following line

var ignore_invalid_agents = pluginconfig['queuepausedcounter']['ignore_invalid_agents'][''];

So by adding the following to /var/www/html/fop2/admin/plugins/queuepausedcounter/queuepausedcounter.ini

ignore_invalid_agents = 1

All seems good and the plugin loads in the page.

This has been tested on Chrome Firefox and Safari and it fixes the paused agents count box not shoing on all of them

Hope this helps someone