It could be a FireFox (FF) vs. Windows 7 issue. Do you preform regular maintenance, and updates? Malware, and virus scans? Your System Specs look strong enough, they are better than mine.
You could try clearing the FF cache.
In 10 go to Tools >Clear Recent History, a small dialog box will open, and I would uncheck all, but cache. Then click Clear Now. Even if it does not restart FF I would.
If you cannot see it, click on Details.
But, it could also be a FF vs certain websites quirk. The X-UA Compatible IE7 tag points to these conditions: https://blogs.msdn.com/b/ie/archive/2008/06/10/introducing-ie-emulateie7
, and it goes back to "Are these sites compatible with certain browsers".
With that being listed in Tools >Page Info it is telling FF to try and emulate certain elements on that page in IE7 fashion.
Years ago it was common to see an area/element on web pages that proclaimed that the site worked better with this or that browser, now it is not, and television stations can be notorious for leaving their website improvement for last.
Out of the four in my area WHP
, and WGAL
WPMT is the only one that has the X-UA-Compatible IE=7 tag, and on my FF10.0.1 they all load within 3seconds, and my FF cache is at 12MB.
It might also be your ISP
I have the lowest tier Verizon DSL 1.0MB download. Check your ISP's homepage to see if it lists the X-UA element mine does not.