Cookies are stored on your computer by websites you visit and contain information such as site preferences or login status.
Note: Cookies are enabled by default in Firefox.
At the top of the Firefox window, click on the Firefox button (Tools menu in Windows XP) and then click Options
Select the Privacy panel.
Set Firefox will: to Use custom settings for history.
Check mark Accept cookies from sites to enable Cookies, and uncheck it to disable them.
If you are troubleshooting problems with cookies, make sure Accept third party cookies is also check marked.
Choose how long cookies are allowed to be stored:
Click OK to close the Options windowClick Close to close the Preferences windowClose the Preferences window