Slow Firefox cleaning not addressed

I have noted for some time now that ccleaner has some sort of problem when it comes to cleaning Firefox cache files. This goes back literally years and many many versions of ccleaner and Firefox. After searching and reviewing forum files it is obvious that this is a recurring and known issue and yet apparently has never been addressed by the authors. I can find post after post after post from people experiencing the same issue and the responses are universally insipid, blaming it on everything from not cleaning often enough to antivirus to who knows - stage of the moon?

There clearly is and has been a problem for some time. Why won't Piniform address it?

Cleaning the cache files on my computer takes only a few seconds to clear many thousands of files. Perhaps it is an issue with your computer?

Without analyzing first:

CLEANING COMPLETE - (4.875 secs)
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450 MB removed.
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Details of files deleted

Firefox/Mozilla - Internet Cache 460,548 KB 13,975 files

piriform can only address that which they can recreate. Granting there are a small number of those with slow cache cleans, the majority of people do not experience this issue.

That said I can think of a few reasons for this

Large Cache

Unclosed Mozilla product (including background processes which did not properly close)

Corrupted cache database file

Cache Compaction (via ccleaner) is turn on

older version of firefox

any or none of the above may contribute to the rare "slow cache cleans"

I personally always suggest that, if it is capable, users let browsers clean themselves (I use an add-on in Firefox) and to use CCleaner as a supplemental cleaning tool.

Cache Compaction (via ccleaner) is turn on

That's the only think that makes CCleaner slow on my system cleaning Firefox ("Firefox clones such as Pale Moon"), CCleaner is not particularly quick at all when 'Firefox -> Compact Databases' is ticked/enabled and when it deems it necessary to compact them.