This is awesome, particularly the ability to screenshot specific elements using element-specific flags:

Firefox DevTools has now added a screenshot command, so you can take screenshots directly from the Console

.@ioctaptceb wrote about the new `:screenshot` functionality in the Console https://t.co/sg3hjvmEQx

An early version is in DevEdition, the latest and nicest in @FirefoxNightly 📸 pic.twitter.com/CFQB6vDY7q

— Firefox DevTools (@FirefoxDevTools) August 23, 2018