(Note: I'm the product manager for the headless browsing feature of Firefox.) I chose to prioritize WebDriver support because it's a popular way to drive heade

(Note: I'm the product manager for the headless browsing feature of Firefox.) I chose to prioritize WebDriver support because it's a popular way to drive headed Firefox, and I wanted to make it as easy as possible for existing WebDriver users to use headless. For use cases that are not well-served by WebDriver, I've considered supporting the Chrome DevTools Protocol, as @brendandahl noted, although I haven't yet made a decision to do so. I'm interested to hear more about the use cases you've considered for which WebDriver is a suboptimal solution. Like @brendandahl, I'm in the Bay Area and would be happy to meet in SF or MV.