I've had a terrible time with hard drive fragmentation, and Firefox eliminated the size of its cache-size adjustment. Out of the box, the cache is 1 gigabyte!! (Allegedly, you can go into about:config and reduce that to 250 MB.) After a couple of hours of browsing, I've been getting 4000 fragmented files and 20,000 fragments. C'mon Firefox; have a heart.

But after clicking Clear Cache, the number of fragmented files drops to 200!

This Clear Cache add-on gives you a choice between clicking and getting a "notification" pop-up to confirm that the cache was cleared, or clicking and getting no notification. I think you need a notification to confirm the action occurred. But there should be an option to have the pop-up disappear after a few seconds, instead of requiring the user to click a tiny x in the corner of the notification each time. That would cut the number of clicks necessary by 50%.

Great little addon. Does what it should.
You can check its work if you enter
- about:cache
in the url-line. In all 3 Parts (memory, disk, appcache) everything cleared.
Only problem: F9 is now the (new) hotkey for this addon. Why not asking if i want it ? And why not a setting where i can change it easily ?
Btw, you can change all Hotkeys for addons at the addon-page, at the settings (icon).

Me ayuda

Hi I want ask is this working when use private browsing?

Clashes with Firefox's reader shortcut F9

muy practico y se invierte muy poco tiempo

I used to always have to go to firefox settings to clear the cache when I was changing things on my website. That was frustrating when I made small changes. This is a lifesaver.

It's great

Please create an option to disable F9 since this is also the shortcut do activate the Firefox read-mode.