Hello, I deployed central management of firefox yesterday and I am suffering firefox hangs on startup (prior to opening any window) after configuration change from pref to localPref. When I kill firefox and run again it usually start normally. Usually one kill is sufficient, but I observed also two subsequent kills are necessary. I created these files: /usr/lib64/firefox/defaults/pref/autoconfig.js: pref("general.config.filename", "firefox.cfg"); pref("general.config.obscure_value", 0); /usr/lib64/firefox/firefox.cfg: // This comment is mandatory lockPref("autoadmin.global_config_url","http://www/firefox/firefox.cfg"); lockPref("autoadmin.append_emailaddr",false); and in the firefox.cfg on a website I have for example: lockPref("network.proxy.type", 4); when I change the lockPref to pref in this file, everything works normally, but when I change it back to lockPref I get a firefox hang on startup. What am I doing wrong? Thanks Marek