Date: 2012feb29 Updated: 2015aug18 OS: Linux Distro: RedHat/Fedora/CentOS Q. When I try to start Firefox I get: XPCOMGlueLoad error for file /usr/lib/xulrunner-2/libxpcom.so:

XPCOMGlueLoad error for file /usr/lib/xulrunner-2/libxpcom.so: /lib/libssl3.so: version `NSS_3.12.6' not found (required by /usr/lib/xulrunner-2/libxul.so) Couldn't load XPCOM.

Why? A. This is because libssl3.so moved (from /lib to /usr/lib) and the version you have at /lib/libssl3.o is old. Rename it so its not found:

mv /lib/libssl3.so /lib/libssl3.so.HIDE

Ensure you have nss:

dnf install nss