Suppose we have sensitive information stored in plaintext within a dm-crypt/VeraCrypt encrypted file and this information is copy-and-pasted by a user into a web browser after decrypting (this could for example be account recovery questions).
If the user is not using a clipboard manager, where (if at all) are the logs for his/her copy-and-paste data stored? In particular how are those cleared and what attacks/threats is such an approach to information management susceptible to?
I'm sorry if this is a rather trivial question.
EDIT: Does higlighting text and drag-and-dropping it into an online form pose the same kind of threat? - note that this doesn't reproduce the text upon trying to 'paste'.