The default of the pref network.http.max-connections has been increased from 30 to 256 in Firefox 6+ versions. Try to decrease the value of the pref <b>network.http.max-connections</b> from 256 to 30 as used in Firefox 3 versions. *https://support.mozilla.com/kb/Firefox+never+finishes+loading+certain+websites ---- See also: *http://blog.bonardo.net/2011/09/30/is-your-firefor-freezing-at-regular-intervals *Places Maintenance: https://addons.mozilla.org/firefox/addon/places-maintenance/