I have followed the procedures as described in [https://lambda-linux.io/blog/2015/01/28/announcing-firefox-browser-support-for-amazon-linux/][1]
However, when I tried to start up firefox, I am still getting
$ firefox
XPCOMGlueLoad error for file /usr/local/firefox/libmozgtk.so:
libgtk-3.so.0: cannot open shared object file: No such file or
directory Couldn't load XPCOM.