Dave. I too would like to remove this. The only thing I found that deals with this area is Settings>Search>Show Clipboard Suggestions. I also tried, disabled Settings>Search>Show Search Suggestions. That didn't work either.

The first day of my v81 install it was showing a link I captured earlier in the day, a link I copied from a text message about a DOD program. When I saw it in Firefox as a choice I freaked out. It's just not acceptable that my browser is watching what I copy and offers it up automatically. I eventually found the setting and turned this off.