Hi ulfr. The package name 'firefox' is listed in the additional dependencies file on the server, because in the early days there were dependencies needed that were not brought in by sce-import. But in more current Debian releases, firefox is actually firefox-esr and there is no firefox package. Therefore a firefox.sce is able to be imported that has no firefox nor firefox-esr in it. I can remove firefox from the additional dependencies file now, which I will do.