javascript

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.

Block JavaScript and Pop-Ups in Your Browser

Chances are good that at some point while browsing the web, you've encountered annoying pop-ups with suspicious warnings or messages. There are even some scams that pop up a message saying you've been involved in illegal activity and prompt you to pay some amount of money to "unlock" your system. Most of these scams are done through JavaScript, and disabling this would prevent this from happening.

Do I have malware on my system?

Dave from Portola Hills, CA

Episode 1213

Dave was on a government website and he got a popup that he may be infected with malware, which forced him to reboot the system to get out of it. He's worried now that he's been infected. Leo says that's a good instinct. This has been happening a lot. Often, it happens if you've mistyped the URL, which leads you to a malware site. This is most likely from Javascript, though, which doesn't impact your computer and is designed to scare you into installing something or paying someone to claim to unlock it.

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.

Why am I getting an 'unresponsive script' warning whenever I open LastPass?

Gordon from Long Island, NY

Episode 1206

Whenever Gordon opens up LastPass, he gets a warning about an unresponsive script and it won't let him continue. Leo says it's damaged. Like a lot of things, LastPass uses JavaScript for the local scripting. Leo suggests uninstalling it and removing the extension, then re-downloading and installing the latest version. He doesn't have to worry about losing his passwords because it stores the passwords encrypted on LastPass's servers.

How can I stop using Adobe Flash?

Roy from Orange County, CA

Episode 1118

Roy keeps getting requests to update Flash when listening to podcasts. And it always crashes. Leo says he hates Adobe Flash with a PASSION and everyone uses it, so he's stuck with it and all it's warts. That's why Leo recommends that if you have to use Flash, that you use it through Google's Chrome browser. What Google does in Chrome is build Flash into the browser and it's updated regularly by Google and it's isolated so it doesn't crash your browser if it crashes. It should work better for you.