OK, not really, but some download sites can offer files that install software you probably don’t want on your computer. Such software can be deceptive and affect your system in unexpected ways. It can also be difficult to remove. Firefox provides built-in Phishing and Malware Protection to help you avoid unwanted software. If you are using Firefox 40 or later, you should have been warned to stay away from this page.
I’m a naughty Web page trying to install software you don’t want!