Hi, Thank you for your message. In order to put a download limit, this would have to be done through a antivirus or firewall in the office. The only about:config entry I found that was close limits the amount of server connections: ''''''''''''network.http.max-persistent-connections-per-server'''''''''''' this can be read more about on this About:config [http://kb.mozillazine.org/About:config_entries MozillaZine Page] MDN also has a way to manage preferences on many platforms if you are interested in checking them out [https://developer.mozilla.org/en-US/Add-ons/Overlay_Extensions/XUL_School/Handling_Preferences?redirectlocale=en-US&redirectslug=XUL%2FSchool_tutorial%2FHandling_Preferences] Parent Controls in Windows can be set up for the user as well, but that is beyond this forum. At this time I do not think that this is possible from just Firefox.