Start at the beginning. Whether you use Chrome, Firefox, or Internet Explorer, updating your browser will help to ensure that you’re getting the most up-to-date security protection.
Using Windows Update will take care of Internet Explorer. Firefox and Chrome should keep themselves current by automatically checking for updates.
To confirm whether you have the latest version of Firefox, click the Firefox tab in the top-left corner, find the help menu, and click About Firefox. In Chrome, click the settings button at the top-right corner of the window and click About Google Chrome; if you see a green checkmark, that means you have the latest version.