I am running Snow Leopard and have QT 7 and QT X installed... Ever since I got my Mac last year I have had problems with Quicktime movies paying in Firefox (I've tolerated it thus far, but am now wanting to fix it). Movies tend to play "okay" if I don't touch the controller (pause, scrub ff, rw), but if I do, the movie lags and bogs down Firefox until it becomes unstuck. I often times can't even close the tab until it becomes unstuck. The same movies in Safari don't do this and play fine. Anyone else experience this? I've noticed Safari uses the Quicktime X style controller and Firefox uses the old style - is there any way to force Firefox to use the newer style/plugin? Please don't respond with "Well, why don't you just use Safari, then." My answer is: "because it lacks the add-ons I want to use."