Firefox 46 crashes in 16.10

I am seeing that FF that ships with 16.10 keeps crashing. There are some open bugs in LP on this. I also seen that people as a work around are using FF 47 which is working. I am asking does any know how to get FF 47 installed on 16.10. I am considering building FF from source usinf the FF-next PPA which is version 49.

I'm not familiar with how PPC handles FF, but I find FF49 improvements (gtk3) to be solid.