WarwolfPrime

I'm not sure if this has been asked, but does this fix work on Firefox 28 on Windows XP? I am not a technically minded guy, but these instructions seem more or less simple, and I can always ask if I have an issue. I have two machines. One of which is on Windows 10 and modern Firefox, where this is not necessary. The other machine is Windows XP and does require this fix as Youtube only just started acting up on Firefox 28 last night.