Just to be clear, the upper window is a custom GTK app. Theoretically it could be firefox, but that's not what this images is illustrating. https://twitter.com

Just to be clear, the upper window is a custom GTK app. Theoretically it could be firefox, but that's not what this images is illustrating. https://twitter.com/misc0110/status/948869631313399809 https://twitter.com/misc0110/status/948869631313399809