Paste password once from clipboard

It would be good if after clicking the copy password button in the browser extensions if after the first paste from the clipboard it set the contents of the clipboard to blank. If the user doesn’t copy something for a long period of time the password would be in their clipboard so a paste once would be good if possible.

You already can set a time to clear the clipboard, and from a programming perspective it is the easiest way to do it. It would be hard to see when the clipboard is used to know when to change it.