A win7 question but I included win10 in case it happens there too and
because I think a lot of win7 experts now only read win10.

If I pass the cursor over a Firefox or Edge section of my task bar, a
box an inch high with a list of all the Firefox or Edge windows pops up
and stays sometimes for a long while. Other programs like Solitaire,
Eudora, Forte Agent don't do this, though they may pop up an unobtrusive
non-annoying tool tip.

Is there a way to get rid of these browser boxes?