I run usually Ccleaner very often in a day. Today, I tested the junk files cleaner of Revo installer.
First, the result of CCleaner.
Then, immediately after the above CC run, I ran Revo cleaner and got this.
This was just the first page. I had 3 more pages of the same firefox files, all of them 0 kb.
How come Ccleaner missed all those firefox 0 kb files?