I have been running CCleaner (free version) for a number of years without problems. Some months ago I upgraded to the pro version and when I close my browser (Firefox) it is supposed to save tabs for the next time I open it up again. This has been happening until recently. Now when CCleaner clears my browser it also clears the tab settings (it never used to).
Has something changed with the product ? I have now reset it not to automatically clean my browser on closing, thus preserving my tabs. Is there anything else I can do?
I believe the checkbox named "Mozilla - Session" is the one causing your issue.
Go to the second tab in ccleaner's cleaning section and uncheck this entry then surf some, close firefox with the tab open and clean only the firefox section (right click the firefox header in ccleaner and choose clean)