"NoiaButtons" add-on adds cartoonish toolbar icons, known from Noia themes, to the default Firefox theme and is also fully compatible with Personas.
This add-ons toolbar buttons have a "fixed" size (like the ones on default theme). Switching between large and small icons inside Firefox settings only alters the space around them.
"NoiaButtons" only changes the main toolbar buttons and the bookmark button placed on personal toolbar.
This is a minor ripoff of Noias toolbar icons from my Noia 4 theme ( https://addons.mozilla.org/addon/noia-4/
) for people that only want to use the Noia icons/buttons with the default Firefox theme or Personas. ;-)