I have signature set for an account and in "Composition & Addressing" settings I have "start my reply above the quote" and "place my signature bellow my reply (above the quote)" set. When I start to write a new message, editor window opens with following composition: * one empty line on the top (here I start to write the text) * signature separator "--" * signature text But when I start a "reply" or "forward" on existing message, editor window opens with following composition: * signature text * quote of the message being forwarded or replied So on "reply" and "forward" scenario I'm missing the initial empty line followed by signature separator line. When I start to write a reply, it is conflicting with signature and also is formatted as signature, so I need to delete signature completely or adjust formatting manually. This was not an issue with older Thunderbird release, this behavior is present only in recent versions. Any idea, how it could be fixed?