When using a password manager, you sometimes copy your password to your clipboard. You might only need to copy it for a couple seconds, and then after that, it's not good for the password to still be in your clipboard.
This add-on fixes this issue by clearing the clipboard when you click the button.
Requires less permissions now. Now it only needs to be able to write to the clipboard and nothing else. Also cleaned up the manifest.json and got rid of some unnecessary stuff.
