This looks really great. Baking in support for test automation seems like a no-brainer and a welcome step forward for web development.
Are any other major browsers taking a similar approach to Safari in terms of native WebDriver support? I saw this Microsoft blog [1] on Edge support of WebDriver, but it's not clear to me what approach they have taken (you still need to download a separate server for instance).
Only one Safari browser instance can be running at any given time, and only one WebDriver session can be attached to the browser instance at a time.
One downside to this approach is that it limits the ability to parallelize tests on a single machine for efficiency purposes.
1. https://blogs.windows.com/msedgedev/2015/07/23/bringing-auto...