ChatZilla is a Firefox addon, clean, easy to use and highly extensible Internet Relay Chat (IRC) client with existing web standards like JavaScript, HTML, and CSS. If you dont know any of this stuff dont worry, you dont have to. ChatZilla is very easy to use and understand.
How do I start ChatZilla?
1. Mozilla Suite and SeaMonkey: Select the menu Window IRC Chat.
2. Mozilla Firefox: Select the menu Tools ChatZilla.
3. Mozilla Firefox: Place the ChatZilla toolbar button on the main toolbar.
4. Start Mozilla Firefox, Mozilla Suite or SeaMonkey with the -chat command-line option.
5. Enter an IRC URL into the location bar (e.g. irc:).

Requirements:
* Firefox
* SeaMonkey

The license of this software is Free, you can free download and free use this irc client software.