Firefox chat issue...am I causing it?

http://i21.photobucket.com/albums/b288/efilnikufecin/Chatbug.jpg

I am using a modified Main.html file (pretty obvious by the bottom menu. This is the source:
PHP:
<html>
<head><title>The Kingdom of Loathing</title>
</head>
<frameset id=rootset cols="5*,*">
	<frameset id=menuset rows="50,*">
		<frame name=menupane src="topmenu.php" scrolling=no></frame>
		<frameset id=mainset cols="200,*">
                        <frame name=charpane src="charpane.php">
                        <frameset id=menuset rows="*,30">
			        <frame name=mainpane src="main.php">
                                <frame name=bottommenupane src="bottommenu.html" scrolling=no></frame>
                        </frameset></frame>
		</frameset>

	</frameset>
	<frame name=chatpane src="lchat.php"></frame>
</frameset>
</html>

It worked fine before I upgraded to 10.9, but since I upgraded the button has been lost. I've always had whitespace to the right of the chat pane, and figured I was causing it but did not care to take the time to fix that. This one I would like to. I noticed In the release notes something about Firefox and chat sizes. Does my modified Main.html interfere with this? If so any suggestions of how to fix it?
 
No, after resizing larger to a certain point The text input box joins the button being most of the way off of the screen. Making chat smaller seems to have no effect when I start from a not-resized chat pane.
 
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