Warning sound but no popup or info?

Hi,

I’ve been on Mozilla Firefox this evening and my Avast can’t stop issuing warning sounds every time I open a page but there’s no popups on whether it’s blocking a program, a threat, malicious content or otherwise. Just the sound that it’s becoming quite irritating by the second. I’ve gone on the program but in realtime shield the traffic history/statistics for every type of protection does not have any negative results, no infected files etc.

Any help?

Thanks.

Best,

Kay.

Wich version of Avast had you installed?
And wich version of Firefox?
With Internet Explorer (or other browser) you have the same problem or not?