First of all, you can create your bookmark list in the cloud and use it on different computers.
Secondly, it features a new button to download any multimedia content being featured on the window. You'll be able to download videos and songs in just one click.
The rest of featurs are very similar to the ones we find in Mozilla, that's why we say it's suspiciously similar, although the truth is that Mozilla Firefox works, so other web browser developers keep an eye on it to make theirs better.
In short, CometBird is another web browser trying to make you feel better while browsing.