Dragonlord [1] filed a deletion request for iceweasel-extension- archforumsearch-it [2]:
Iceweasel dropped upstream, debian now uses Firefox. [1] https://aur.archlinux.org/account/Dragonlord/ [2] https://aur.archlinux.org/pkgbase/iceweasel-extension-archforumsearch-it/
