This is in the nature of a complaint about the comodo chat line. I clicked on the comodo chat line and they referred me to geeks chat line for help with Icedragon or comododragon. There I asked for advice about the “unsupported browser message” that comes up with gmail. Instead of giving me an answer or even saying they could not help, they said they could help me if I gave remote access to my computer to a total stranger, who would then be able to diagnose the problem. My complaint is that any security based organisation should even suggest giving remote access to a total stranger.
PS I have since discovered this message also appears on chrome, and on comodo dragon. It does not appear to prevent gmail from working.