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→Using DevTools Profiler
* Follow all the set up instructions above to get the prefs set right for dev tools / remote debugging.
* Install In classic install the profiler extension from: https://github.com/bgirard/Gecko-Profiler-Addon/raw/master/geckoprofiler.xpi
** Note, by default this extension starts with profiling turned on (for the local build). The toolbar icon will be colored when profiling is active, grayed when off. It's best to keep this extension disabled when not in use.
* In classic set the pref 'profiler.threads' and 'profiler.stackwalk' to true.
