first add the following repos to the yum by following the steps

first become root with su command and put the following 2 commands to download new rpm fusion in terminal

  1. rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
  2. rpm -Uvh http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

now try

yum list firefox

if rpm fusion is installed correctly it wiil display current version of firefox installed and available updates

then to update

yum update firefox

 

its doneee