Try any --convert-to operation using a debug build => there is updater activity logged: > warn:desktop.updater:32556:36760:desktop/source/app/updater.cxx:620: download did not succeed. Error code: 404 > warn:desktop.updater:32556:36760:desktop/source/app/updater.cxx:786: error during the update check: download did not succeed There must not be attempts to initiate updater activity in headless operation.