iceweasel-esr wheezy error

[Christopher Patrick]

I addeddeb http://mozilla.debian.net/ wheezy-backports iceweasel-esr to my /etc/apt/sources.list, ran a sudo apt-get update and got following error message 

W: Failed to fetch http://mozilla.debian.net/dists/wheezy-backports/iceweasel-esr/binary-amd64/Packages  404  Not Found [IP: 140.211.166.43 80]
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