Bug 674779 adds about:performance. From bug 674779 comment 149 > It's a top-like tool that displays for each webpage and add-on the amount of CPU, system time, CPOW time, jank during the latest n milliseconds. For the moment, that's only for JS code (including native code called by JS). In future versions, I hope to add memory use and plug-in use. > > This feature is Nightly-only for the time being, with no definite plans to let it ride the trains. For the moment, the intended users are 1/ us; 2/ add-on developers. I hope to eventually make this useful for power users, but this will require UX and l10n work. This would not directly accessible if your application hasn't a location bar (I altered a link on about:support to test it, Error console input can also open it from JavaScript).

Comment on attachment 8588080 [details] [diff] [review] tb part, v1 Review of attachment 8588080 [details] [diff] [review]: ----------------------------------------------------------------- ::: mail/installer/package-manifest.in @@ +543,5 @@ > #endif > @RESPATH@/components/toolkit_asyncshutdown.xpt > @RESPATH@/components/toolkit_filewatcher.xpt > @RESPATH@/components/toolkit_formautofill.xpt > +@RESPATH@/components/toolkit_perfmonitoring.xpt nit: i think the convention is to have these be in alphabetical order, so move it down one row

Comment on attachment 8588082 [details] [diff] [review] suite part, v1 r=me Also a=CLOSED TREE for SeaMonkey