Toolbar background

[waslap]

The following code works under C++/X11 but not Emscripten/Firefox

   QPalette tp = toolBar->palette();
   tp.setBrush(QPalette::Background, QBrush(QPixmap(":/images/toolbar.png")));
   toolBar->setBackgroundRole(QPalette::Background);
   toolBar->setAutoFillBackground(true);
   toolBar->setPalette(tp);

My intention is to set the toolbar's bacground image to something stylistic instead of flat grey default. It however comes out black in the browser whereas a desktop app sets it fine. Is there another way i can try this ?