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Why Does Activity Monitor Say Firefox is 100% CPU?

Fazzl

Fazzl

macrumors 6502a
Original poster
Aug 13, 2007
580
4
Don't mind the not responding, it happens sometime with Firefox. But why does it list CPU at 100 or sometimes over 100%?

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B

Bunker

macrumors member
Oct 28, 2007
90
0
Flash. Update your Flash player.

Also update your Firefox to latest version 5.0.x.

Best is to move to safari or Chrome when using Lion. :D
 
Mackilroy

Mackilroy

macrumors 68040
Jun 29, 2006
3,921
585
Bunker said:
Flash. Update your Flash player.

Also update your Firefox to latest version 5.0.x.

Best is to move to safari or Chrome when using Lion. :D
Click to expand...
Eh, Firefox 5 is also CPU-intensive. Ever since FF3 it's gone downhill in CPU usage.
 
Benbikeman

Benbikeman

macrumors 6502a
May 17, 2011
616
1
London, England
It's definitely Flash player rather than Firefox itself. Visit a series of webpages with no flash at all (NB: most banner ads use Flash) and it's fine. Visit Flash-intensive sites and it goes crazy.

I've reluctantly switched to Safari for now (which also has Flash issues, but copes better than FF).
 
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