I have VM on Microsoft Hyper-V server for testing automatic updates for our organization. Firefox 14.0.1 is installed on this machine. While 15.0.1 was the current version, updates worked fine. Since 16.0 is available its stop working. There are log file from error console here: ------------------------------------------------------------------------------------ AUS:SVC Checker:getUpdateURL - update URL: https://aus3.mozilla.org/update/3/Firefox/14.0.1/20120713134347/WINNT_x86-msvc/en-US/release/Windows_NT%206.1.1.0%20(x86)/default/default/update.xml AUS:SVC Checker:checkForUpdates - sending request to: https://aus3.mozilla.org/update/3/Firefox/14.0.1/20120713134347/WINNT_x86-msvc/en-US/release/Windows_NT%206.1.1.0%20(x86)/default/default/update.xml UTM:SVC TimerManager:notify - notified @mozilla.org/updates/update-service;1 AUS:SVC Checker:onProgress - 42/42 AUS:SVC Checker:onLoad - request completed downloading document AUS:SVC Checker:onLoad - number of updates available: 0 ----------------------------------------------------- When I try to update manually via Help--> Updates, all working fine Why Firefox cannot update to newest version 16.0 ? Why it not able to update to 15.0. 1, if 16.0 not available for any reason ? I would like accent, that I am not interested in any manual solutions, like download and install latest version, update manually e.t.c. I am going for create fully automatic update schema for our organization.