I’ve implemented the necessary additions and changes for patch 4.2 and Firelands to the latest alpha of MRT. They are based on datamined information and may or may not work. Additionally, Firelands is not included in LibBabble-Zone-3.0 yet, so it will only work for english clients. If you are in a guild, which is raiding on the PTR and killing the bosses and would like to help with the development of MRT, please feel free to get the latest alpha of MRT from CurseForge.com and provide some feedback.
The corresponding libs are updated. A few translations are still missing, but english, german, french, chinese and spanish clients should work. If nothing goes wrong and Curse.com stays online, then an updated version of MRT should be ready on patch day.