There are several ways to participate in IRC and here are a some options that are ideal for newcomers.
* [http://mibbit.com/ Mibbit]: is a great online chat client that doesn't require any installation and setting up an account is free. Mozilla uses Mibbit in the [http://air.mozilla.com Air Mozilla] website to allow our community members to easily join the conversation during meetings or events.
* [https://addons.mozilla.org/en-US/firefox/addon/chatzilla/ Chatzilla] is an extension which may be installed in Firefox; it comes built-in with SeaMonkey. You can also install it [http://chatzilla.rdmsoft.com/xulrunner/ standalone].