Been using this for a few months now and the new UI is a nice visual upgrade, but I will remove this extension just as quickly as I installed it if the "ad" section at the bottom of the window isn't removed. It wasn't there before today (when the new UI initially updated) and suddenly another update rolls out today with this nonsense attached to it. I don't need recommendations for other extensions while using this FYI and I am sure other users don't either.

Eta: Since the dev states the extension is his own, maybe this should be indicated without having to click on it to find that out. This is a studies notifier, the extension being recommended is a "free game claimer", and it's exactly why it presents as an unrelated ad. Changing my rating to 3 stars for now because it does work better than the official Prolific Assistant, but if any additional visual clutter in the form of ads are added, I'll come back and edit.