I looked it up on their FAQ and (IMHO), it just seems too limited for my purposes (video chat):

Does Fire support Yahoo Webcams?
At this time Fire does not support Yahoo webcams. There is some work going on in the open source community to add support for these, and we anticipate adding it to Fire in the near future.

Does Fire support Voice Chat for Yahoo and AIM?
At this time Fire does not support voice chat with Yahoo and AIM. Unfortunately, the audio implementations used by these services are unique to the Microsoft Windows platform, and even the official Macintosh clients do not support it. Since the audio CODECs are proprietary and use patented technology, it is unlikely that Fire will be able to support them until the original manufacturers make them available on Mac OS X. (Ideally as a part of QuickTime, if Apple is listening‍….)