First install the appropriate jre for your system –  http://java.com/en/download/manual.jsp?locale=en

then – as root:

updatedb 
locate libnpjp2.so

for firefox browser:

copy the locate of the file, in my case it was : 
/usr/java/jre1.7.0_51/lib/amd64/libnpjp2.so

cd /usr/lib64/mozilla/plugins
ln -s "location of file" .

example: 
ln -s /usr/java/jre1.7.0_51/lib/amd64/libnpjp2.so .

for chrome: 

cd /opt/google/chrome/
mkdir plugins
cd plugins
ln -s /usr/java/jre1.7.0_51/lib/amd64/libnpjp2.so .

restart both browsers