There is a long standing bug in Firefox which is supposed to be fixed in version 3 which prevents the input caret (the flashing vertical bar) from showing up in edit boxes in qooxdoo dialogs.

The cure for this is to set the overflow property of the parent of the edit box to “auto”.

For example:

  var e = new qx.ui.layout.VerticalBoxLayout;
  e.setWidth('100%');
  e.setHeight('100%');
  e.setMargin(4);
  e.setOverflow('auto');	
  e.add(myContent);
  myWindow.add(e);

instead of:

  myWindow.add(myContent);