Delete Everything από TheWebDev

This add-on adds a button(trash icon) to the browser's toolbar. When the user clicks the button, the add-on clears the browsing data.
The user can modify what the addon will clear and for how long from the the add-on's settings, which can be accessed and modified in its options page.

Refer to screenshots to have a clear understanding.

Icons made by iconixar from www.flaticon.com