Robert2 Posted November 17, 2018 Share Posted November 17, 2018 Windows 10 Home version 1809 64-bit Firefox Quantum 63.03 64-bit CCleaner v5.49.6856 Whenever I “Run Cleaner”, I get the following message: “Firefox needs to be closed to clean the Internet Cache. Do you want CCleaner to close Firefox?” The problem is I just closed Firefox and Firefox is no longer listed among the running apps. This message never appeared before CCleaner last update. Link to comment Share on other sites More sharing options...
Moderators Nergal Posted November 17, 2018 Moderators Share Posted November 17, 2018 Make sure firefox isn't hiding in task manager's processes section. 97% of the time an addon is keeping firefox from fully closing ADVICE FOR USING CCleaner'S REGISTRY INTEGRITY SECTION DON'T JUST CLEAN EVERYTHING THAT'S CHECKED OFF. Do your Registry Cleaning in small bits (at the very least Check-mark by Check-mark) ALWAYS BACKUP THE ENTRY, YOU NEVER KNOW WHAT YOU'LL BREAK IF YOU DON'T. Support at https://support.ccleaner.com/s/?language=en_US Pro users file a PRIORITY SUPPORT via email support@ccleaner.com Link to comment Share on other sites More sharing options...
Moderators nukecad Posted November 17, 2018 Moderators Share Posted November 17, 2018 Occasionally you can be too quick - and Firefox slow to fully close. The cache in particular can sometimes take 5 to 10 seconds before it has closed. But disappears from task manager before that. So if you're quick and try to clean it before it has fully closed you get that message. Or as Nergal says some add on could be keeping it open. *** Out of Beer Error ->->-> Recovering Memory *** Worried about 'Tracking Files'? Worried about why some files come back after cleaning? See this link:https://community.ccleaner.com/topic/52668-tracking-files/?tab=comments#comment-300043 Link to comment Share on other sites More sharing options...
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