Why is Firefox playing music from websites I am not currently surfing?

A few days ago I stumbled on a Tom and Jerry game. Now it seems that whenever I am using Firefox the game music plays I can't figure out how to stop it!


Be sure to choose me as best answer, because one of these options will work. I should know; I am a programmer.

Options:

1. Restart your computer.

THEN, IF THAT DIDN'T WORK,

2. Reinstall FireFox.

THEN, IF THAT DIDN'T WORK,

3. Open FireFox. Press Ctrl+Alt+Del. Click the processes tab. Then, click "Image Name" to sort alphabetically. Then, ensure that there is only one copy of firefox.exe running. If there is one, message me. If there are two, try ending one of the processes.

IF ALL ELSE FAILS,

4. Use Internet Explorer or Google Chrome.

If nothing works, please message me.
Source(s):
I'm a programmer.