I'm trying to install the web history lens, but I'm only able to access my bookmarks from the Dash.
According to the instructions I found on askUbuntu this is because the lens needs access to my sources/scope.

"In order to gather data, the History lens needs scopes/sources, without scopes, the lens offers only Firefox's bookmarks, without an actual web history and, so, reducing its utility."

The short question is, how do I install and or grant access to scopes/sources so that I can search my web history from the Dash?