As a viable alternative to ad revenue, in future, some more websites may start using services that use visitors’ CPU power to generate cryptocurrency profits. It might be a good idea to take precautions! The way to do this is to use JavaScript-blocking extensions. Here's some of the browser extensions that are now available.

ScriptSafe for Chrome

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If you are a Chrome user and looking for an extension to stop certain websites from your computer resources for cryptocurrency mining, try ScriptSafe. The extension gives users control of the web and more secure browsing while emphasizing simplicity and intuitiveness. It blocks JavaScript from running by default. Its only shortfall is that it does not feature a Whitelist, meaning every site’s script is blocked, including google.com.

Install minerBlock extension for Chrome

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It is a useful extension for Chrome browser to block web-based cryptocurrency miners all over the web. A good feature about the extension is that you can reverse the change i.e, if you do not mind lending your CPU for usage by the miner, you can remove their sites from the list of blocked domains.

NoCoin for Chrome

Alternatively, you can use ‘No Coin’ extension. The extension simply blocks a list of blacklisted domains in *blacklist.txt*. Clicking on the icon shows you a button to pause/unpause its function. Use this simple solution to prevent exploitation of any known/unknown security vulnerabilities without any loss of functionality.

NoScript Security Suite for Firefox

This little extension is for Firefox users. It allows only active content to run only from sites you trust, and protect you against XSS and Clickjacking attacks. Try NoScript.

Stay alert, stay safe!