browsing history in firefox & opera=> not cleaned?

The privacy cleaner in comodo system cleaner does
not seem to clean browsing history for Firefox 3.0.6 and opera 9.63

I’ve tested it 2 different machines but unfortunately the same behavior.
(seems as a bug?)

Any idea why? (And yes I’ve check the “browsing history” checkbox)

Thanks in advance

Michael

System cleaner 1.1.63928.28