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→Using Dev Tools Profiler
** if you close the devtools window, this usually results in the metro browser shutting down
== Using Dev Tools DevTools Profiler ==
* Follow all the set up instructions above to get the prefs set right for dev tools / remote debugging.
* 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.
* Restartclassic
* From the toolbar button dropdown, select TCP, enter the metro browser's ip address, and click connect. You should get a remote connection warning in the metro browser.
* After you have finishes collecting data, click analyze.
