I found the answer. This is only on new blank tabs. Of of the preview pages was playing the music.

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.

I'm having this problem and it isn't going away! Nearly every time I open a new tab, I get some sort of noise or music. I HATE THIS! How can I make it stop?!

When I set the new tabs to open in "blank", not "enhanced" or "classic", the jingle doesn't happen. But I have to keep re-setting it when I restart Firefox. How can I keep the "blank" setting?

Hi Marion

You can set the browser.newtab.url pref to about:blank on the about:config page to completely disable the new tab page.

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

If you do not keep changes after a restart or otherwise have problems with preferences, see:

• http://kb.mozillazine.org/Preferences_not_saved

See also this article about the New Tab page (about:newtab):

• https://support.mozilla.org/kb/new-tab-page-show-hide-and-customize-top-sites