Auto Clear Downloads автор Sugarbranch, Inc.

An add-on to always clear the downloads list of all completed downloads.

This extension makes up for the fact that Firefox does not have an option to keep its download list clear at all times. You can clear the downloads list yourself by hand, but Firefox currently doesn't have an option to automatically clear it for you. This extension does it for you automatically.

This extension works in a very simple way: After a specified amount of time (the default is 60 seconds), the downloads list is cleared out for you. Don't worry, the files you downloaded are still there, and in-progress downloads are not harmed.

The source for this extension can be found at https://github.com/tsuliwaensis/AlwaysClear-Firefox-Version