Flash adverts can be really annoying. If you add sound to it it's a real nightmare. But fear no more my friends! There is a very simple solution. Adblock Plus. It is a browser add-on which can deal with ads really well. If you use it with Flashblock (another add-on) you can fully enjoy internet browsing without any ads.
Adblock Plus 1.1.3: https://addons.mozilla.org/en-US/firefox/addon/1865
Flashblock 18.104.22.168: https://addons.mozilla.org/en-US/firefox/addon/433