Unable to installl Linkedin Addon
Firefox could not install the search plugin from "https://addons.mozilla.org/firefox/downloads/latest/4606/addon-4606-latest.xml?src=search" because an engine with the same name already exists.
I have no idea what this means, nor what I am supposed to do with it. What is an "engine"?
Alla svar (1)
this is referring to a search engine in the firefox search bar on the top right of the window - apparently you already have linked-in installed there!
fore more information see Search bar - add, change and manage search engines on Firefox