I remember the FF bugs for removing it suggested only 7 percent of people used it.
What frustrates me is that 7 percent x web scale is not a small figure; and many of those were curators - prepping info for others.
Not sure if they still do this, but Mozilla used to give new hires a little toy and say, "This is your million users; try not to abuse them too much." That concept is built-in to the culture there. Why take up space and memory for the 93% of users who don't use that feature, when an add-on can do just as good a job for the 7%?
