Upgrade Firefox version to 21

I have upgraded my Fedora 16 firefox to the latest version 21. Please check my upgrade steps for this process.

[root@localhost ajeesh]# cd /usr/local/src/
[root@localhost src]# wget http://rpms.famillecollet.com/remi-release-16.rpm

[root@localhost src]# rpm -Uvh remi-release-16.rpm
warning: remi-release-16.rpm: Header V3 DSA/SHA1 Signature, key ID 00f97f56: NOKEY
Preparing...                ########################################### [100%]
   1:remi-release           ########################################### [100%]

[root@localhost src]# yum --enablerepo=remi list firefox
Installed Packages

firefox.i686                                                                  18.0-1.fc16                                                                       @updates

Available Packages                                                                                                                                                       
firefox.i686                                                                  21.0-4.fc16.remi                                                                  remi 

[root@localhost src]# yum --enablerepo=remi update firefox

Dependencies Resolved

========================================================================================================================================================================
 Package                                     Arch                              Version                                          Repository                         Size
========================================================================================================================================================================
Updating:
 firefox                                     i686                              21.0-4.fc16.remi                                 remi                               26 M
Installing for dependencies:
 xulrunner-last                              i686                              21.0-2.fc16.remi                                 remi                               19 M

Transaction Summary
========================================================================================================================================================================
Install       1 Package
Upgrade       1 Package

Total download size: 45 M
Is this ok [y/N]: y