Assegnate 4 su 5 stelle

Help me please I got this error when I try to download it:

Install Error
Firefox could not install the search plugin from "https://addons.mozilla.org/en-US/firefox/downloads/latest/10434/addon-10434-latest.xml?src=addondetail" because an engine with the same name already exists.

I do not have install it yet so why is it teloing me that there is an engine with the same name?

I'll try something and post a new comment.