Looking for a plugin which wont reload with the website

Hi,
I am looking for a plugin which won’t reload even if the user moves on to another page. It will kind of stick on the browser tab. I hope I am clear enough.

I want to add some iframe or html code. Kind of like a song which will keep playing even if the user goes to another page on the website. Is there any such plugins available? I searched but failed to find one. Any suggestions would be appreciated.

Thanks.