从火狐官网下载的firefox-9.0.1.tar.bz2解压后，进入firefox文件夹，执行./firefox会提示缺少库，故采用yum安装Firefox9。
1、切换到root用户
su -
2、安装Remi repository
- rpm -Uvh http://download.fedora.redhat.com/pub/epel/6/i386/epel-release-6-5.noarch.rpm
- rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
3、查看可用版本
# yum list firefox
4、更新或者安装Firefox9
# yum update firefox # yum install firefox
参考：http://www.if-not-true-then-false.com/2011/install-firefox-on-fedora-centos-red-hat-rhel/