Hi Zug,

Comodo Dragon is a good browser and is very much the same as Google Chrome. It gives you more security features, it uses Comodo DNS by default to filter out unsafe websites, you can start your browser directly in Incognito mode, moreover it won't send any information to Google etc... you can check the above link given by ashwin to see more features of Comodo.

Now, coming to your question, comparing it to FF... a difficult one to do . Both browsers are good and I think it is just a personal choice. Chromium based browsers are faster than firefox, whereas Firefox has huge number of addons than Chrome and hence it offers better customization that Chrome.

I've been using Comodo Dragon since a long time. It is good, except that it gives you more number of warnings especially regarding SSL certificates. Many websites use https: for login pages and Comodo Dragon marks many of those certificates as low-quality ones, even those certificates which are offered by well known companies like Thwate etc. So, everytime when you goto https site, Comodo Dragon will show you warning and you have to click on Ignore everytime. That's the only problem. But now with latest version 14, Comodo Dragon comes with an option to disable such warnings. By default, it is ON. So, you have to turn it off by changing Comodo Dragon settings.

Hope this helps