Hi, I need to install the extension webdav 1.0.5 on our closed network but I get "webDAV Launcher could not be installed because it is not compatible with Firefox 6.0" In order to verify that the root cause is the lack on an internet connection, I tried for following on a machine in our open network: re-installed the browser, disconnected the network cable, tried to install the xpi, got the same error message, re-connected the cable, tried to install - successfully. so i guess that for some reason the fire fox tries to verify something over the internet. is there a way to disable this verification? am i missing something? any help will be much appreciated. Thanks, Elad