Well two things 1 here is screen shots proving it doesnt work manually adding the custom location to the INI File
next when I run CCleaner its not even looking for the Custom Location so when I open Waterfox
every bit of history is untouched.
The latest version of CCleaner doesn't touch the Newest Waterfox
Perhaps a open Menu Customize and add the Location with a drop box it would then be able to add any other
The above is the ini image meant to upload not the first one .... cant delete the wrong image...