I ran into this problem as well a few days ago. Please make this 2 separate applications. I 'd like: 1) to have my Firefox passwords cleaned 2) to keep my Thunderbird passwords 3) without having to change a setting in either of the programs for this. It 's exactly the purpose of CCleaner to be able to set all cleaning options in 1 program. + it 's just not clear in the user interface in any way. It has the Firefox icon + "Firefox / Mozilla". Changing that to the Mozilla icon + "Mozilla profiles" would already make things much clearer, imho. But best of all is to just separate the 2.