I never got good at shutting down the whole computer, with the
suggestions in a prior thread BUT

It popped into my head that maybe I can mute the browswer tab I'm
looking at and listening too.

Both Chrome and Firefox have one or more, if you search Extensions or
Add-ons. Since I've been using sling to watch tv news, it doesn't work
well on Firefox (they say to use Chrome) so I'm using Chome and I got
the extension Sleep Timer, and it was easy to install and start. I
presume it will actually mute the tab when I said to, (2 hours from now,
well, 1:42.) It gives the choice of muting or closing.

An add-on with the same icon is offered in Firefox.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)