Vivaldi's predecessor, Opera, actually included an IRC client that I used back in the day. I maintained an interest in Vivaldi because Opera Mail was easily th

Vivaldi's predecessor, Opera, actually included an IRC client that I used back in the day. I maintained an interest in Vivaldi because Opera Mail was easily the best client I've ever used, and while Vivaldi Mail lacks a few of the features that I appreciated about Opera (e.g., select-to-quote, default top-quoting/bottom-response, obvious text-based emails), it's still far and away the best current desktop application.