While I'm sure this is a very nice add-on, the developer quit supporting it five years ago, and disappeared from Firefox and GitHub four years ago. His website has also vanished. I can't get behind an abandoned project.

Doesn't work. I have my own HTML page of links, and after I used this, those links that have been accessed still show as having been accessed, and my browsing history still pops up from the address bar. So despite telling it to clear EVERYTHING, it clearly doesn't.
Don't bother.

One star. Could not get it to work with latest version of Firefox. Installed and reinstalled. Nope... did not work.

Clear Cache - lack of switching off history clearing. I need clear all cookies except for history of sites viewed from let's say last 1-2 weeks.

Nice idea but doesn't seem to work on my version of FF: 88.0.1 for Linux Mint 1.0

Used to work, doesn't any more.

Awful extension. Clears everything instead of allowing the cleaning of a specific site.

How to download

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).