Actually, I gave up on Ghostery a long time ago: it nuked way too much actually necessary content. Probably 10% of my pages wouldn’t work any more.
For me, the best addons for FF are:
zoomtoolbar (fantastic for folks with eyesight issues)
Adblock Plus with a few of the Fanboy and Easylist subscriptions, one of which is an anti-tracker.
Tab Mix Plus
IE View
Flashblock
Downloadhelper
StatusbarEx
ViewAbout
Also, MozBackup is a great program for backing up and restoring FF and Tbird configurations once you figure out one or two eccentricities.
Thanks catnipman, I look forward to trying them out.