Rated 1 out of 5 stars
Failed. Did not add any icon to the add-on toolbar or anywhere else.
edited 13Sept2011. Regarding developer's response (below): of course I already understood how to customize a toolbar. This add-on did not supply any icon to slide onto a toolbar. I originally wrote, "Did not add any icon... anywhere else," which covers it.
Check out this please: http://ajnasz.hu/how-to-customize-firefox-toolbars