I hope you like the topic title.
There is a popular online gaming service/store called Steam.
The site is at Steam ( http://www.steampowered.com/ )
It has a built-in browser, based on WebKit. Source: http://en.wikipedia.org/wiki/Steam_%28content_delivery%29#Browser
It appears to keep a cache / temporarily files in: C:\Program Files (x86)\Steam\config\htmlcache on 64-bit Windows or C:\Program Files\Steam\config\htmlcache on 32-bit Windows, and/or C:\Program Files (x86)\Steam\appcache\httpcache or C:\Program Files\Steam\appcache\httpcache .
I would like to request support for CCleaner to clean up these files (optional checkbox, of course, just like everything else).
Please investigate and try to add this to CCleaner in a future release.
Thank you.