How do I use Page Setup on Firefox?

To customize how pages are printed in Firefox, you can use Page Setup: 
 Select File > Page Setup. 
 In Page Setup, you can change the following settings for pages you want to print: 
 Format & Options: Choose the orientation, scale, and other options: o Orientation:+ Portrait: Choose this to position the pagenormally, with the shorter side facing up.+ Landscape: Choose this to position the pagesideways, with the longer side facing up.o Scale: Type in a percentage of the original size. For example,type “50” to make each page half the size of the original page.+ Shrink To Fit Page Width: Select this to automaticallyresize the page to the width of the paper.o Options:+ Print Background (colors and images): Select this toprint background images and colors. If unselected only pictures andcolor in the foreground (in front) are printed. Margins & Header/Footer: Click this tab to set up margins,headers, and footers: o Margins:+ Top, Bottom, Left, Right: Type a margin in the given unitsfor the top, bottom, left, and right margins.o Headers & Footers: Each drop-down list represents eithera header or a footer area. The top row of drop-down lists are for theleft,center, and right header areas. The bottom row are for the left, center,and right footer areas. In each drop-down list, choose one of the followingoptions:+ -blank -: Show nothing in this area.+ Title: Show the web page title.+ URL : Show the web page URL (URL’s usually start with“ http:// ”).+ Date/Time: Show the date and time when the web page isprinted.+ Page #: Show the page number of each page.+ Page # of #: Show the page number along with the total numberof pages. For example, if you print a five page web page, “3 of 5”would be shown on the third page.+ Custom: Type your own text. You can include any of thefollowing codes to print specific information: &PT: Page Number with Total (Example: “3 of 5”) 
 &P: Page Number 
 &D: Date 
 &U: URL 
 
 &T: Page Title