Downloading the addon from https://addons.mozilla.org/thunderbird/downloads/latest/4631/ and manually installing it into icedove seems to work, so a workaround is possible.
-- Herwin Weststrate -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
