For the last couple of months I have had problems streaming some of the channels that come via Sling when I try to watch them on my Dell Latitude E5450 laptop. I can see them fine on my regular t.v. but now not on the laptop. That's a huge change in the last few months because for years I could stream every Sling channel to my laptop. Since my t.v. does not use Firefox, that suggests the problem is something Firefox has done. Not surprising, I guess. Probably happened when it was fixing some other something it screwed up. Nonetheless, any ideas for how to resolve this WITHIN Firefox capabilities? (And don't suggest it's Sling's fault. Sling streams just fine, thank you very much, in Edge.)