Firefox on Windows has two different menu options: the classic full menu bar, and the compact menus accessed using an orange Firefox button (the button has the word Firefox, not an icon).

If you have the classic menu bar, you can use:

Tools menu > Options > Privacy

If you don't have either menu, you might be in full screen mode. Try the F11 function key to toggle between full screen and normal views.

Can you find it?

Also, Firefox comes with cookies enabled out of the box, so if you don't find anything unusual in the built-in settings, check whether you have any add-ons designed to block cookies. You can check for those starting here:

orange Firefox button (or Tools menu) > Add-ons > Extensions category

See also:

• http://kb.mozillazine.org/Cookies
• http://kb.mozillazine.org/Websites_report_cookies_are_disabled

You can check if DOM Storage is enabled.

• http://kb.mozillazine.org/dom.storage.enabled
• http://kb.mozillazine.org/about:config

You can inspect and manage the permissions for all domains on the about:permissions page.

• https://support.mozilla.org/kb/how-do-i-manage-website-permissions