Zen is delightful to use, and based on Firefox. I just don't get what's going on at Mozilla.

Most people don't like Zen (or Arc). Which is fine. I'm a big keyboard person so I love it, especially with the vimium plugin. But sometimes people get confused at my browser because they don't know how to navigate. Which is understandable

What I like about Mozilla is they made a hackable browser so we can have things like Zen, WaterFox, or whatever floats your boat.