Simply put, yes. You are wasting your time waiting for an official 64bit firefox. You're just going to have to due with nightly, waterfox and palemoon. -- Argue opinions using facts. Not facts using opinions.
I don't really see the point unless you want Firefox to be able to access more than 2 GB of memory or something when it seems like people get all bent out of shape when it gets even close to 1 GB of RAM usage. Perhaps I'm missing something here.
When I do use IE9, I use the 32bit version just cause it's the default activated version.