[ehurdler]

NWTIM:
As for your version of Firefox I am unsure any difference than the one I am using. But just open up Tools->Web Developer->Web Console.

Once Web Console is open, on the tabs across the top of the console turn everything off but Net. In the filter/search box on the right of the console search for Manifest. I usually open the console on the page I am viewing, do the search, then refresh the page just to make sure I see everything I am searching for the start of the page loading. Give that a try, try my method I described earlier, see if you get same result. I am trying to capture the USA vs CZE Hockey game from today.