The Duck Duck Go extension stoped working in the newest Opera Developer release: 20.0.1376.0
The icon appears, but the search box does not appear.
Thanks for letting us know @Mykelb, I'll look into it.
@Mykelb could you please clarify what precisely isn't working for you? When I click on the icon the popup appears. Is that what is not working for you?
It WFM too. I'm closing this issue right now, unless someone can reproduce it.