In this thread I'll paste edits replying to the question that ended up in the wrong place.
Topic on Talk:Reading/Web/PDF Functionality/Flow
"Die Funktion hat keine Rückmeldung, wie weit sie ist. Wenn sie nicht fertig ist, sagt sie einfach, das Dokument existiert nicht." – anonymous edit of the board description
Translation from de to en: The function(ality) provides no feedback how far it [the process] is. If it is not done/ready [yet?], it just says that the document does not exist.
"I think it is brilliant!" – Special:Diff/2486666