Injects an ID attribute into the element (even overwriting the present one). A no go for me. And most probably not necessary.

This is an abolutely great add on! Most of the "copy link text" addons ignores the text within buttons for example.

Does what it says on the tin.
Very simple and efficient.
The only issue is that it's sometimes hard to estimate the boundary of the element you're trying to copy without any visual hint.