This has gotten some attention, especially about a week ago, but I really hope more people will continue to try it and, if interested, support it. It is Firefox, but heavily modified to please a different audience that prefers a slightly different UI than Firefox. It has some of the appeal of Arc, Vivaldi, and the Sidebery extension.
In my view, it is very promising, and all competition in this space is good. Here it is on Github, also.
Just wish Zen adds small details/features like Arc team does. Small details/features are crucial in the early stages of the project.
My hopes are high but I’m trying to keep my expectations low. Just one guy and some contributors is a much different context than a bunch of venture capital. But I agree.