Note: Please update to the latest version of firefox before following these directions, as older version are less secure and have different menu options. Firefox is free and can be found on their Website
To change your cookie settings in Firefox, click the "Firefox" menu in the upper-left hand corner, then "Options", and "Options" again. Click on the "Privacy" tab. On this page there will be a "Cookies" section. Here you can choose to accept or deny all cookies, or you can modify the cookie list for more specific cookie settings.
The first time you run the browser, it should ask you if you want to make Firefox your default browser. If you answered ‘no’ and you later decide you would like it to act as your default browser, Click the "Firefox" menu in the upper-left hand corner, then "Options", and "Options" again, then select the "Advanced" tab. At the bottom, there is a section called "System Defaults". In this section, check the box next to "Always check to see if Firefox is the default browser on startup", then click the "Check Now" button. If Firefox is not already the default web browser, it will ask if you want to change it. Click "Yes" and Firefox will be set as your default web browser.
To enable popup blocking in Firefox, click the "Firefox" menu in the upper-left hand corner, then "Options" or "Preferences", then click on the "Content" tab. On this page, check the box next to "Block pop-up windows". This will block (almost) all popups from web pages. To manage exceptions to this, you can click the "Exceptions" button next to that setting.
To clear private data in Firefox, click on the "History" or "Tools" menu, then "Clear Recent History". Select the data you want to clear, then click the "Clear Now" button to clear the selected information.