Ccleaner cleans Internet Explorer, but not using it!

CCleaner for Windows
1

So,

I 'upgraded' from Vista to Win10 and immediately installed Firefox as my default browser. Lo and behold, every time I run Ccleaner, I get more scrubbing of IE than I do of Firefox. What gives? I don't like or use IE (or MS Edge) at all, but IE still gets cleaned of who-knows-what every time. Any suggestions?

2

the same folders used by IE are also used by other MS products, including Windows itself.

this isn't new to Win10 either by the way, MS has been using the IE and Temp Internet Folders for a bunch of stuff.

3

Allot of antivirus software will also use IE for their auto-updating, as will allot of other software.