How do I update ChatZilla to a different version in SeaMonkey on Linux/BSD?
In SeaMonkey, ChatZilla will need to update some files which are in the application directory (usually this is /usr/local/seamonkey). This directory is normally only writable by root, which will cause problems if you run SeaMonkey normally. You are advised to temporarily make yourself the owner of this directory (for example using the chown tool) and then run SeaMonkey normally, install the update, restart SeaMonkey, and check everything works. After making sure everything is OK, make sure you set root to be the owner of the installation directory again.