After removing the Global Menu, Firefox has a single "Label Empty"

[Zren]

We should filter this, if it's not too much trouble. The in app menu isn't populated either, so it's a FireFox bug.

[ren2r]

I could be done with something like this...

if 'label' in item_props:
    if item_props['label'] == 'Root' or item_props['label'] == 'Label Empty':
        pass
    else:
        new_path = path + PATHSEPERATOR + item_props['label']
else:
    new_path = path

This way it's not needed to replace "Label Empty" and "Root" in format_path() and it will not be show in Firefox after removing the Global menu or Appmenu window button.