Editing website icons in favorites, etc.
In an attempt to fit more sites on my shortcut toolbar in Firefox, I removed all text from my favorites and now just use their icon images to distinguish them from one another.
Some sites, of course, don't have icons, and some I want to remove the icons from. I would imagine this could be done rather simply, but I'm not seeing any way to do it.
Anyone know how to do it, or even whether or not it's even possible?