Biet-O-Zilla cannot be installed into iceweasel 31.3.0
 

Hello,
I tried to load that add-on into iceweasel (on my samsung nc10 with debian 7).
It should happens by downloading
http://www.pcwelt.de/downloads/Biet-...a-1310491.html
but it cannot be installed. (same issue by downloading from here http://www.chip.de/downloads/c1_down...174848&v=3600& and opening the unpacked file with icevweasel).
Is there any recommendation how to install it?