Disconnect is defaulting back to DuckDuckGo which we already have as default search engine
Disconnect nowadays defaults back to DuckDuckGo automatically. As we ship DuckDuckGo as our default search engine this makes Disconnect not that useful anymore. We should consider getting it back to being a real meta search engine or just remove it from Tor Browser.
This got reported on our blog: https://blog.torproject.org/blog/tor-browser-65-released#comment-233747.