Network printer TroubleShooting
Cannot print with FireFox
Symptom: You can print with kwrite. However, when trying to print with FireFox, the Print button is greyed out. Depending on FireFox' version, there is an information about missing printer information.
Solution: Make sure your cups client can ping the cups server under its hostname. For example, if the cups server is venus.universe with an IP address of 192.168.0.5, add a line to /etc/hosts on the cups client:
192.168.0.5 venus.universe venus