Chrome for iOS is a not a supported Browser?!

Every time I use Firefly (the browser version) on my iPhone, I get a message saying that i'm not using a supported browser and so performance will be suboptimal. Among the browsers that it recommends is the latest version of Chrome. The problem is that all I've been using since I've ever used Firefly has been the latest version of Chrome for iOS! I even double checked that Chrome was up-to-date -- and it was. Yet I'm still getting this error message every single time I use Firefly. What gives?