Question

Firefox very slow and hogs resources when displayed on 1 monitor of 2 monitor set up, runs normally when displayed on the second monitor.

Firefox has worked perfectly well for some time on this machine (Dual core AMD Athlon with XP SP3). This morning at startup Firefox opened on my second (DVI) monitor, not on its usual VGA connected screen. I used the maximise button to shrink the window from full screen and dragged it to the correct monitor and remaximised it. It then was very slow, mouse movements happened in large increments making it difficult to point and click, switching tabs resulted in a slow vertical wipe to reveal content rather than instantaneous switching, loading websites was very slow indeed. Using task manager indicated that one CPU core was running at or near max much of the time, particularly when moving the mouse. I rebooted and also reset Firefox to no avail. However, if I move the Firefox window from the VGA monitor to the DVI one then performance/resource usage is normal. I can open other apps on the VGA monitor (eg MS Word) and they behave normally. It just seems to be Firefox that is having this problem.

↓ Show more ↑ Show less
  • All posts
  • Helpful Solutions
  • post
  • owner
  • post
  • owner
  • post
  • post
  • owner
  • post
  • post
  • post
  • post
  • owner
  • owner