2438927 - ITS Up/down: Mozilla Firefox 52.0 and higher | SAP Knowledge Base Article

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2438927 - ITS Up/down: Mozilla Firefox 52.0 and higher


The frontend service methods like upload, download, execute, … don't work, when executed with Mozilla Firefox 52.0 or higher.

The following symptoms may occur:

  • never ending loop:

neverending loop.png

  • Java applet does not start:

java applet.png



  • SAP GUI for HTML (Webgui)
  • Internet Transaction Server (ITS)
  • Mozilla Firefox
  • SAP NetWeaver


SAP NetWeaver Application Server for ABAP all versions ; SAP NetWeaver all versions


gui_download, display, upload, download, herunterladen, hochladen, up-/download, anzeigen, Dokument, NWBC, Enterprise Portal, endless loop, freeze, stuck,  NPAPI, File browser, Virtual File System
SAPGUI for HTML applet was not started within 30 seconds, java is not installed or deactivated in the browser, Please wait. You will be forwarded automatically. This page had to be included for technical reasons. (for old kernel and system (Basis 700 with Kernel 721) , KBA , BC-FES-ITS , SAP Internet Transaction Server , BC-FES-WGU , SAP GUI for HTML , Problem

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