NoScript Strengthens Security Even If You Allow Scripting

NoScript is one of the most popular add-ons for Firefox. It’s designed to disable scripting and other mobile code to secure the browser. Yet, using Firefox with NoScript is like driving on a city street with Stop signs on every block: You have to enable scripting for every website you visit and didn’t have a chance to whitelist.

Security-conscious people are OK with the interruptions and are willing to invest time into building up a whitelist of commonly-visited sites. Yet, I suspect many NoScript users automatically click “allow” to enable scripting on the site without much thinking. And I bet many people uninstall the add-on altogether to avoid making scripting decisions.

If NoScript’s script whitelisting feature isn’t for you, you can still benefit from other ways in which it strengthens security of Firefox: namely, Application Boundaries Enforcer (ABE) and Cross-site scripting (XSS). Simply enable scripts globally using NoScript’s options menu:

XSS and ABE-related features of NoScript will remain enabled, and I recommend keeping them that way:

If you’re using Firefox and gave up on NoScript, give it a try after allowing scripts to run by default. Though you’ll lose the ability to selectively enable mobile code on trusted websites, you’ll retain some of the add-on’s benefits for strengthening security of the browser.

— Lenny Zeltser

Updated

About the Author

Lenny Zeltser develops teams, products, and programs that use information security to achieve business results. Over the past two decades, Lenny has been leading efforts to establish resilient security practices and solve hard security problems. As a respected author and speaker, he has been advancing cybersecurity tradecraft and contributing to the community. His insights build upon 20 years of real-world experiences, a Computer Science degree from the University of Pennsylvania, and an MBA degree from MIT Sloan.

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