Disable header and footer lines printed with web pages in Firefox

Task:
           To disable the header and footer lines getting printed with Web Pages while printing from Firefox permanently. In general, users needs to disable these settings in printer settings window each time while give print. The procedure given below will disable the options permanently.

Solution:
            Firefox itself has its own header and footer settings for this purpose and disabling of this will not fulfill the complete task what we want. For that we need to disable that settings in printer side also. To do so,

            Open Firefox and run the url 'about:config' to get the Firefox's settings page.

For Header,

1. To filter out the settings respect to our need, give '_header'
2. Unset all the values related to header such as '&T', '&D' and etc., from both Firefox and Printer that you have installed

For Footer,

1. To filter out the settings respect to our need, give 'footer'
2. Unset all the values related to header such as '&T', '&D' and etc., from both Firefox and Printer that you have installed

From now, no Header and Footer lines will be there in printouts that print.

Note : This is tested under Ubuntu 11.10.