Because the browser isn&#x27;t isolated to only using a single website&#x2F;application... users are likely to hit any number of sites, including those with popups that look like security warnings that then exploit and infect the rest of your network only to destroy everything.<p>For example look at speedtest.com in a windows browser, when you really meant speedtest.net ... This is only a single example, it happens and bad people are out there.