I heard music when I opened, but it only happened once? it was in my lodgings. I didn’t have any other tabs open.
Was it an advertisement, perhaps?
This has been reported on occasion - it seems to be a symptom of malware on your PC. You might want to run a scan, just to be safe!
I used to get random Louis Armstrong music or a DJ beat sometimes, although it hasn’t happened since we got Avast.