iHeartRadio does not work with CometBird.
update: assuming you’re talking about iheartradio.com website, their service supports some versions of firefox, if you use an equivalent version of cometbird it should work.
If you find that it works with firefox and not with the same version of cometbird, then the website would need to be contacted so they can adjust their settings to identify cometbird as firefox. If you click on the link they provide when you have an unsupported browser, it will give you more info.
Ok, I installed the latest version of cometbird running on windows seven professional 64bit and iheartradio.com works fine.
I’ll move this to the cometbird section in case anyone else has a problem in which case we are going to need a lot more info..