Suggestions:
The channels can be ordered vertically.
Users online can be collapsed / removed.
Private Messages are colored instead of in a different channel.
I got this expanding the window and moving the unnecessary portions off-screen. Only downsides are not being able to view private messages without shifting firefox to the right and normal tabs without opening a second window.
This thread is closed to new posts.
However, you are welcome to reference it
from a new thread; link this with the html
<a href="/bboard/q-and-a-fetch-msg.tcl?msg_id=003KzJ">"Tile Tabs" Add-on for Firefox</a>