Can't delete website reference

I have Firefox Version 5.0 (2) on my iPad. I want to delete all references to a particular website. I go into Firefox, close all the open windows but one, and then go to google.com to get to a common website. Then I "click" on the small number in the upper right of the screen which minimizes the open window. Then on the bar at the bottom I click on the 3 horizontal bars, then click on the gear symbol to open "Settings", and in "Settings" I click on "Clear Private Data". When I open that, all 4 choices are turned on (I see orange), and then I click on "Clear Private Data", end then "OK". So all references to the website should be gone - right? But they are not, for when I go back into Firefox and open a new tab, go the horizontal bar at the top, then click on the little star in between the 4 little squares on the left and the little clock to the right, the website I want deleted still appears. (is that a Bookmark?) How do I get rid of that website reference?