It happens all the time: you’re reading a very interesting page and you think you should share it on Twitter. So all you want to do is to type your tweet, include the URI and post it. This should be very, very fast. Unfortunately, I often found that Twitter takes a load of time. Especially, if all you want is to tweet…
Also see how to add DuckDuckGo as a search engine in Gnome Shell built-in web search.