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Block Malicious Content in Your Browser

Many websites on the internet use Javascript. In fact, it's often critical for websites to function at all — it's not optional. That being said, Javascript can be used maliciously to compromise your system, or simply use your computer to do things without your knowledge. For example, there are a lot of websites these days, such as CoinHive, that are making money by running a little bit of code on your computer with the purpose of generating cryptocurrency.

How can I stop popups from crashing my phone browser?

Ed from San Jose, CA

Episode 1213

Ed was surfing on his iPhone in privacy mode and his app screen suddenly locked when he was searching, saying he was engaging in illegal traffic and he had to pay $500 to unlock the screen. Leo says that's a scam done by Javascript. His phone really isn't locked down. It's not leaving anything on the system. It's "sandboxed." It's not perfect, though, as there could be holes in the Javascript code. Leo suggests double tapping the home button and swiping up to kill the app. On the desktop, NoScript will prevent this from happening by blocking Javascript.