One glitch to mention --

when you install yourself or use a third-party compile of Firefox. (I use my own install.) Your library path may not include the SSL libs for mozilla, and Slack used to put these in separate Mozilla package, which I do not use.

To resolve this I have a tricksy little way of keeping the library path up to date -- I put the following script snippet into my /etc/rc.d/rc.local file:

# put ssl libs of Firefox into the library paths list if found
for f in `ls -d /usr/lib/firefox* 2>/dev/null`
do 
	if [ ! -L "$f" ]; then
  		sslpath=$f
		break
	fi
done
if [ $sslpath ];then
	inldconf=`grep $sslpath /etc/ld.so.conf`
	if [ ! "$inldconf" ]; then
		echo $sslpath >> /etc/ld.so.conf
	fi
fi

This keeps the SSL libs in my library path, even after many upgrades :)