Follow these instructions to enable Java in your web browser on Ubuntu Linux.

Google Chrome

• Become the root user by running the su command and then enter the super-user password. Type:
  sudo -s
• Create a directory called plugins if you do not have it. Type:
  mkdir -p /opt/google/chrome/plugins
• Go to Google chrome plugins directory before you make the symbolic link. Type:
  cd /opt/google/chrome/plugins
• Create a symbolic link. Type:
  ln -s /usr/local/java/jre1.7.0/lib/amd64/libnpjp2.so
• Restart your browser and test Java

Mozilla Firefox

• Become the root user by running the su command and then enter the super-user password. Type:
  sudo -s
• Create a directory called plugins if you do not have it. Type:
  mkdir -p /usr/lib/mozilla/plugins
• Go to Google chrome plugins directory before you make the symbolic link. Type:
  cd /usr/lib/mozilla/plugins
• Create a symbolic link. Type:
  ln -s /usr/local/java/jre1.7.0/lib/amd64/libnpjp2.so
• Restart your browser and test Java