If you want to keep the music and chatbox open and keep listening to the music, here is what I suggest you do:

Go to the Home page of the forum on your first tab
and open a sub-forum or a forum link you want to visit by right-clicking the link
and open it in a new tab
Now you can use your second tab to navigate the forum and still keep the music and keep it from starting over and over again.

-ShinGamix