1. Change the option from Clear all to Clear all Download History 2. Change the wording from delete to clear from "Are you sure you want to *delete* all of your download history? to "Are you sure you want to clear all of your download history? Change pop-up button from [delete] to [clear]
The word delete in downloads might be mistaken to mean delete actual downloads.
3. Add a new option - Clear all Download History (without prompt)