This tutorial explains the steps required for automatically removing the downloaded list items in Safari. In Safari, the downloaded files are stored in the specified location under Safari Preferences.
Click the Safari menu and select Preferences from menu list.
In the Preferences window and navigate to General tab. The download location for Safari browser is specified in “Save downloaded files to” option.
Now to automatically clear the download list items, you can either select When Safari Quits or Upon Successful Download option for the Remove download list items.
This would ensure that the download list items are cleared automatically based on your selection i.e either when you exit Safari or once the download is complete.