After using the free version of this great program for years without problems, suddenly Firefox 'Recent history' is still there after running CCleaner. 'Internet Cache', 'History', 'Cookies' and 'Session' are all checked. Windows Task Manager shows that no Firefox process is running in the background. I'm using the latest version of CCleaner on Windows 10 (64bit) and Firefox 58.0.1 (64bit). I can clean 'Recent History' manually from inside Firefox.
Is this a bug or what am I doing wrong? Any suggestions most welcome . .