I got most of my info from here along with the boss guides they have a great trash guide too.
http://www.icy-veins.com/firelands-trash-guide it breaks it down pack by pack per boss.
Map of the instance:
Boss videos: All of a Tank POV. I hope you enjoy! Thanks again to Icy Veins !
Shannox written guide and video -
Lord Rhyolith written guide-
Beth'tilac written guide -
Baleroc written guide -
Alysrazor written guide -
Majordomo Staghelm written guide -
Ragnaros written guide -