Z 2 z 5 gwězdkow pógódnośony

wót Narutokun dnja Feb. 3, 2010 · trajny wótkaz

Can't install, get this message:

Firefox could not install the search plugin from "https://addons.mozilla.org/en-US/firefox/downloads/latest/12142/addon-12142-latest.xml?src=addondetail" because an engine with the same name already exists.

why?