Issue with Firefox junk cleaning

[cameraman]

I have to frequently clean up all junk left by Firefox. I think the R-Wipe & Clean does a better job of this than other cleaners.
But recently, if you clean up everything in the Mozilla Firefox section, then after opening the Firefox, the following message box always appears:



I think this needs to be fixed.

[Alt]

Thank you for reporting! I've passed this to our developers.