CCLEANER v5.31.6105 (13 Jun 2017) doesn't clean firefox cache/cookies/etc

Firefox cache and cookies are no longer being cleaned by ccleaner. Any ideas for a fix?

Which Version of Firefox have u?

Last Version is v54

https://forum.piriform.com/index.php?showtopic=48468

Make sure firefox isn't running when you clean; sometimes firefox doesn't completely exit, so check your task manager for firefox.exe or plugin container.

I have Firefox V54.

I've checked task manager and Firefox (and Mozilla) processes are not running. Yet, the firefox cache, cookies, preferences, etc, are all marked as "Skipped" when ccleaner completes.

Me also exactly the same thing included screenshot

post-79439-0-83920300-1499705946_thumb.jpg

This still seems to be an issue that needs fixing?