''BDEVEEN [[#question-1126829|said]]'' <blockquote> Since Firefox updated automatically to 47.0, the sound navigation plugin does NOT work anymore! </blockquote> You likely have a older version (1.3.0 or older) of Navigational Sounds installed in Firefox as the extension author released a 1.4.0 update yesterday to work with Firefox 45.0 and newer including the Firefox 47.0 Release. https://addons.mozilla.org/firefox/addon/navigational-sounds/<blockquote>Version 1.4.0 Released June 11, 2016 14.2 kB Works with Firefox 45.0 and later Navigational Sounds 1.4.0 fixes compatibility with Firefox 47</blockquote> Also this is a Extension as Plugins refer to say Flash player, Java, Silverlight.

Thanks for your quick answer, I'm webmaster of www.Bigfun.be, and for admin purposes; I really needed that sounds, It works fine again, thanks a lot !