How Not to update a package in Arch Linux
To ignore a package from being upgraded, you need to add it to IgnorePkg or members of IgnoreGroup in the pacman.conf file
sudo nano /etc/pacman.conf
Now uncomment the #IgnorePkg = by removing the # from the start of the line. Now add the names of the packages you do not want to update.
IgnorePkg = firefox thunderbird vlc gedit
You can add multiple package names one after the another like shown above.
Ignore Group Update
To ignore a group of packages from updating, you need to add the group name in the [c]IgnoreGroup[/c] line
IgnoreGroup = plasma-desktop
The above example will ignore the whole plasma group from updates.