This benchmark automatically opens 150 sites with a 1.5 seconds pause after each new site. A textbox appears after 90 seconds indicating that the benchmark has finished.
You can see detailed information about your memory behavior if you type
about:memory in your Firefox URL bar.
Firefox users have to disable the popup blocker for my site and adjust
dom.popup_maximum to 200 in
If you want to monitor the memory behavior after closing all sites, also close this site.
Chrome users have to run this script.