Rated 1 out of 5 stars

yazan: supergianchi tarih: Eyl. 9, 2019 ·

It does not work on Linux (elementary OS) with Thunderbird 60.8.0 (64-bit).
It attaches only a text file that contains the address of the copied file.

This review is for a previous version of the add-on (1.2.68). 

yazan: Michael Ganss (Geliştirici) tarih: Eyl. 9, 2019 ·

This may be an issue with the file manager (see https://github.com/mganss/AttachFromClipboard/issues/2 ). Please report which file manager you are using at the issue thread on GitHub. Thanks.