I am A HUGE fan of CCleaner. I have recently switched to using the browser FLOCK. I know it has a built in cleaner, BUT I feel better if something is cleaned with CCleaner. I use CCleaner on all 3 of my computers as well as my mom's and my sisters computers that I maintian. A Flock cleaner added to CCleaner would be great.
I, too, use Flock 2 and Firefox 3. Although I find Flock more flexible than Firefox 3, due to CCleaner not able to clean Flock's data I use Flock only for few sites. A Flock browser added to CCleaner would be great.