Maintain your browser history, cache, and extensions.

When you're browsing numerous sites daily, a lot of information can be stored by your browser to help you return to a website in the future, or help improve your browsing experience. Sometimes, you may accidentally go to the wrong site that could be malicious, or when you download software, certain things can be installed on your browser that you don't want or that you are unaware of. 

It's recommended to clear your browser cache and history regularly, as well as maintain what kind of extensions you have on your browser and uninstall ones you don't recognize. Doing this can help you avoid malware that can use cached data to prey upon people and remove information that you definitely don't want to be stored by your browser.