Does not clear cache.
FF 78.0.1 (64-bit)
archlinux - 1.0

Doesn't clear History

There is no notification when cache is cleared (ff 61.0.1)

Only clears the standard caches reported by about:cache! The HOSTS file is still hidden by some hidden cache in Firefox. Refreshing a web page does not use HOSTS to fetch from the correct IP address. I clicked the icon, since I use F9 for another purpose. Firefox 56.0.2 (32-bit).