add-on is (as i found so far) the best for firefox. but, i have problem/or i do not understand - when i stay with mouse on image (and i do not know it's real size), it is shown yellow spinning circle (somekind of propeler), and it stays so for a eternity. not shown picture, not shown some error or information ("this picture is too big", or something similar).
is that bug, feature or i didn't settid it right?