Ok, here is a stranger one. I upgraded from 10.10 to 11.4 via online update. Machine is HP 6910p 4 gig ram and 32bit OS version. Intel graphics. In earlier versions, playback withing Firefox was fine. When enlarging to full screen, playback was choppy, or froze, but was corrected by shrinking and enlarging again. Now I have the reverse!. It is choppy in the firefox window, and smooth in full screen. Very strange.
Ok, here is a stranger one. I upgraded from 10.10 to 11.4 via online update. Machine is HP 6910p 4 gig ram and 32bit OS version. Intel graphics. In earlier versions, playback withing Firefox was fine. When enlarging to full screen, playback was choppy, or froze, but was corrected by shrinking and enlarging again. Now I have the reverse!. It is choppy in the firefox window, and smooth in full screen. Very strange.