Firefox 2 memory leak... found out what it was?

Well... after trying to track down everything, apparently a "extension that fixed a memory leak" didn't -- despite what everything said! So, despite the McAfee SiteAdviser plugin being useful to see if websites I develop are being redlisted, it's gotta go!

Oh, and the "performancing" extension also has a memory leak with the newest version at this date. But I never used it, so it's gone.