Hmm ? But you wrote that xpi's setup should be used...not the installed Extension. Should I copy the whole profile directory to sof/project/firefox/profile ? Does anybody know this ? http://emmanuel.gasne.free.fr/xpimaker/manual.php#config4 or that http://ted.mielczarek.org/code/mozilla/extensionwiz/ I try to create a Firefox with my Company CI... it should have settings, bookmarks, extensions, searchengines and a button to the companies homepage. Is it possible to make my XPI compatible ? Thanks for your tool and the quick answer !!! X_Burner