it would be nice if zabbix gui page titles could be slightly customised - it might be enough to provide two fields, prefix/postfix. anything entered in these fields is properly added to all page titles.
for example, entering " (Company A)" in the postfix would result in titles like "Configuration of items (Company A)".
rationale - when using multiple zabbix installations, it is handy to figure out which resides in which tab by taking a quick glance instead of opening each tab individually.