Assegnate 5 su 5 stelle

I downloaded this extension to remove the signature from messages in inbox so that large attachments can be deleted, following the instructions under this link:
https://sourceforge.net/p/enigmail/forum/support/thread/d9522fd7/?limit=25
ie. remove string
protocol="application/x-pkcs7-signature";
or something similar.
It would be great if this operation could be automated, i.e. on right click, header tools improved offern an option "Remove signature", which removes the protocol= line. I would imagine it is very easy to implement. Thank you for considering