 fan runs high watching youtube,macbook pro retina 15 mid 2015 after updating second to last Firefox update. Safari doesnt have this issue. Pls help. I-Firefox Isithangami Sokweseka Ukwesekwa kwe-Mozilla91215 02:5591215 11:3791215 13:5191215 14:4291815 08:5791815 09:4291815 10:0891815 11:2491815 11:4617569 izisombululo 158914 izimpendulo91815 12:1391815 15:5791815 16:20 