They also say things like "Efficient built-in ad blocker Based on Ublock Origin" and "Keyboard navigation Vim bindings", so I think they're developing both a ne

They also say things like "Efficient built-in ad blocker Based on Ublock Origin" and "Keyboard navigation Vim bindings", so I think they're developing both a new browser and a new engine for the browser to use, and kind of conflating the two when discussing features on their home page.