WFM Rated 2 out of 5 stars

Didn't impact memory usage much, but seemed to drop CPU usage, perhaps coincidentally.
Before, after:
PID COMMAND %CPU TIME #TH #WQ #POR #MREGS RPRVT RSHRD RSIZE VPRVT VSIZE PGRP PPID STATE UID FAULTS COW MSGSENT MSGRECV CSW PAGEINS USER
5412 firefox-bin 46.7 19:24:31 42 1 928 13601- 1458M+ 155M- 1816M- 2050M- 5641M- 5408 1 sleeping 504 380431255+ 302645 2176802792+ 1058870181+ 161795947+ 355071 xy
5412 firefox-bin 18.0 19:25:31 41 1 926 13514- 1340M- 145M+ 1690M- 1932M- 5462M- 5408 1 sleeping 504 380679191 302658 2178073052+ 1059467255+ 161908252+ 355469 xy