This addon provide a simple and quick way to clear file cache from Tool Menu.
Maybe my other addon "Remove All Cookies" will help you.
[Call for volunteers]
This addon can handle multiple languages. But "English" and "Japanese" supported only at this moment.
If you can translate "Clear File Cache" and access key "C" into your language.
It's very helpful for many users in the world.
Please entry your translation at Google Drive Form below.
I'm really appreciate for your help.
Important Information: 2016/03/16
Mozilla is changing a lot of things about add-on development again. So this addon might be stop working in the future.
"The Future of Developing Firefox Add-ons | Mozilla Add-ons Blog"
"Add-ons/developer/communication - MozillaWiki - Upcoming Changes in Add-on Development"https://wiki.mozilla.org/Add-ons/developer/communication#Upcoming_Changes_in_Add-on_Development