As of firebug 1.10, firecookie is part of it[0]. So in addition, a new version of this package must replace xul-ext-firecookie and the later can be removed then from the Debian repos.
Cheers, Chris. [0] https://addons.mozilla.org/en-US/firefox/addon/firecookie/
smime.p7s
Description: S/MIME cryptographic signature
