You can manually uninstall Firefox by deleting its files and folders, for details see http://kb.mozillazine.org/Uninstalling_Firefox

Thanks tony. I am not sure this is a solution to my problem. I am running firefox 4 under Win XP. I want to uninstall Firefox. When I go to START, CONTROL PANEL, ADD OR REMOVE PROGRAMS, Firefox is not shown in the list of programs on my computer. I have a shortcut on my desktop. How do I get rid of Firefox 4. Sorry if I seem dense but I am frustrated by Firefox 4 and want to get rid of it.

The link I posted above gives details of the files and folders that you can delete to manually remove Firefox if the uninstaller does not work or is not available.

Look in the section titled "On Windows", a few lines below that it states "Even if the uninstall fails, as it may in some cases, continue on with the rest of the uninstall instructions." Just below there it gives details of what you can delete.

Tony. Thank you I will follow the instructions you referenced. Hopefully that will take care of things.