Mark copied passwords as concealed data so CopyLess2 doesn't store it in clipboard history

Clipboard history apps such as CopyLess2 are useful. CopyLess2 includes a configurable filter to stop copying data from certain applications. This works fine with the Bitwarden app, but when using the browser plugin, CopyLess detects the browser, so it stores the copied password.

I don’t want to block copying from my browser.

CopyLess2 supports ignoring data that is marked as concealed. Is there any way that the browser plugin could mark the data as concealed?

One reason that the Bitwarden app may be better than the browser plugin.