Comment 105 for bug 168261

This only replaces one problem with another. Optimized output provides no absolute height and width, which poses problems with a number of renderers when trying to display the svg file as a standalone. For example, page scaling in most Browsers will not work any longer.

From my viewpoint it would be clearly preferable to have a checkbox in the document preferences, or even two, stating "set page size/set viewbox size", so authors have full control.