Rated 2 out of 5 stars

I like the idea of the tool very much, but in FF 3.5.5 the submenu never shows up, whether I hold down either of the SHIFT keys or not. So I'm stuck with one colour and no option of removing highlights. So, until the tool is updated, or somebody shows me how to access the submenu, I'm afraid I'll have to uninstall the add-on.