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.
Reason: Even if you only specify the cups server's IP, not its hostname, the cups client will try to reach the cups server via its name during the client-/server dialog.
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