Quote: "Mozilla Firefox has problems with Mozilla Firefox plugins?"
I meant Firefox occasionally has problems with plugins developed for Mozilla Suite as does Netscape 7.2. Usually there's no problem but sometimes there is.
Quote: "yes i ment using the IRC on this site"
Ohhh... I thought you meant Chatzilla which is an IRC client that runs in Mozilla/Netscape/Firefox. OK, in that case the docs on the mozdev.org recommend JRE 5 I think (I know anything earlier than 1.3 won't work). Also, the Microsoft JVM that comes with Windows only works with IE so make sure it's not trying to use that.
EDIT: Yeah, that's correct. I found the docs here: http://plugindoc.mozdev.org/faqs/java.html