Why is it important to keep your browser up-to-date? The most important reason to keep your browser up-to-date is to protect your system from any recent security attacks, like harmful programs and viruses that may leak your information or allow unintended parties to make any transactions on your behalf. It not only allows you to detect and fix security problems but also lets you take advantage of latest browser features. Internet browsers normally update automatically but you can also check and install updates manually.