Glad I could help 
Yes, chromedriver is started by Wallaby. You don’t have to start anything manually.
Cypress as @alanvardy mentioned is also really, really nice! I can highly recommend it if you want to test your system as a black box, so exclusively test through the UI. Writing UI tests is a breeze using Cypress. In my case however, I needed to do “grey box”-testing, so, I had to both call some Elixir functions like e.g. insert(:post) and “click through the UI”. Since wallaby is written Elixir I could easily do both with it. I’m not sure about this, but maybe @alanvardy knows whether it’s possible to call Elixir functions using Cypress?
