Online Radio

So does anyone else get a black tab on the bottom left of their screen that says “online radio” when they click on the “Sayonara No, Sono Toki Made”manga, idk if it’ll show up on anything else but so far only “Sayonara No, Sono Toki Made” has it. I got so scared at first cause I thought it was a virus. Maybe it is but anyways if y’all got it too please let me know.