> noise-WebProgress-stop&data==0&subject.originalURI.spec!='about:config'&&su bject.originalURI.spec==gBrowser.currentURI.spec

> I’m trying to detect when the focused tab completes loading, but I
> can’t get it detected just right. I’ve tried both noise-WebProgress-
> stop and DOMContentLoaded. The differences from my desired behaviour
> are such:

> 1. I want the sound to play only when the current tab completes
> loading, not background tabs. (Otherwise, it’s just confusing.)
> 2. I want the sound to play only when a page actually completes
> loading, not when I have manually stopped it in the middle of loading.
> 3. The sound should never play when I open a new blank tab. I have
> tried DOMContentLoaded&event.target.baseURI!='about:blank', but that
> doesn’t work.

> Incidentally, Navigational Sounds seems to have fewer problems with
> the ‘Complete Navigation’ event.

> What event should I use to avoid these problems?

> Thank you.

> Thanks for the quick response. However, I came across a bug with this
> filter: not only does this prevent the sound from being played by an
> unfocused tab, but it also prevents that tab from playing the sound if
> I focus it before it finishes loading. Thus:

> 1. Middle-click a link to open it in a background tab (which means
> that browser.tabs.loadInBackground must be set to 'true').
> 2. Switch to that tab before it finishes loading.
> 3. Let it finish loading.
>        Expected result: I hear the ‘complete navigation’ sound.
>        Actual result: I hear nothing.

> Thank you.