not in any version of firefox i use - also, firefox is very very configurable - for instance i always install tabx to put the tab close button on every tab WHERE IOT BELONGS!
how about you not mess with user preferences without giving said users the ability to put things right again - remember, in X there is a pecking order....
1: USER FIRST
2: window manager second
3 *****APPLICATION LAST*****
other than this, i should point out that xchat is about the only irc client worth using :)
not trying to make war, just trying to have you not mess with an interface that WAS almost perfect.