This How To is for anyone wanting to run Firefox nightly or Firefox branded browser
1: Download your version from the nightly builds here (http://nightly.mozilla.org/)
2: Extract the file to /home/yourusername ... Done correctly, the extraction will now be /home/yourusername/firefox
3: Run
/home/yourusername/firefox/firefox
If you get an error stating another instance of Firefox is running, rename /home/yourusername/.mozilla to /home/yourusername/.mozilla_old and run Firefox again
I am running version 31.0a1 (2014-03-24) now without issues... One bonus of running Firefox is that the auto update works perfectly everytime you start it