How to collect profiling information

Question

I try to use -Xrunhprof:cpu:old to collect some profiling information.
However I got the following information:
HPROF ERROR: thread local table NULL in method exit 08990B84
HPROF ERROR: thread local table NULL in method exit 08990B84
HPROF ERROR: thread local table NULL in method exit 0023DC6C
HPROF ERROR : stack underflow in method exit
HPROF ERROR : stack underflow in method exit
Any idea?

Answer 1

Someone else will probably provide a better answer. I am not aware of such a debugging feature (monitoring CPU use) built into firefox.
* have you seen [[firefox consumes a lot of CPU resources]]
If this occur in firefox [[safe mode]] there is a problem that needs investigating.
Do not forget to watch the number of instances of ''plugincontainer.exe'' that are open, there is a known bug causing problems with that see [/questions/812618]
Note also you are able to for instance turn off the hardware acceleration, or by setting a preference (''html5.parser.enable;true/false'') turn off the html5 browser ability of Firefox.
Presumably you have seen the Web Developer options from the firefox button. (And maybe considered firebug add-on, depending on what you are trying to check)