Tools > Startup > Firefox bug

Uninstalled several FF addons but CCleaner tab still shows those addons as active. Threying to delete them produces "not found" errors. The referenced profile files are gone yet CCleaner still displays them, even after all of the cleaning functions and registry cleaning is run and CCleaner is restarted.

See if this applies; http://forum.piriform.com/index.php?showtopic=40781&hl=

Sounds like you are still seeing things that should be deleted.

(Ignore the title, just follow the advice)