How do I start ChatZilla in Mozilla Firefox?
If you have ChatZilla 0.9.51 or newer, you can place an IRC Chat button on your toolbar, which will start ChatZilla. You can also select ChatZilla from the Tools menu. The only way to start older ChatZilla versions in Mozilla Firefox is via an irc: URL. Type “irc:” in the url bar to launch ChatZilla and connect to your default channels. You may want to file a bookmark in your personal toolbar to make this easier.