NoScript for Firefox

Updated on:

February 17, 2024



Operating System:

Windows 11 / Windows 10 / Windows 8 / Windows 7


Free / Trial

NoScript is a free and open-source browser extension that enhances the security of the Firefox web browser by allowing users to control which scripts and web content are allowed to run on their system. It is compatible with Firefox on desktop and mobile devices, and provides a range of features to help protect users from malicious web content.


Script blocking: NoScript allows users to block a range of potentially dangerous scripts, such as JavaScript, Java, Flash, and other plugins, from running on their system.

Site whitelisting: Users can create whitelists of trusted websites to ensure that scripts from those sites are always allowed to run.

XSS protection: NoScript includes protection against cross-site scripting (XSS) attacks, which are a common type of web-based attack.

Clickjacking protection: NoScript also includes protection against clickjacking, which is a technique that can be used to trick users into clicking on a hidden or disguised element on a website.

Content Security Policy (CSP) enforcement: NoScript can enforce the Content Security Policy (CSP) of a website, which helps prevent attacks such as XSS and data injection attacks.


Effective security: NoScript provides powerful protection against a range of web-based attacks, including XSS and clickjacking.

Easy to use: NoScript is easy to use, with a simple interface that allows users to quickly enable or disable script blocking and site whitelisting.

Customizable: NoScript is highly customizable, with a range of options for blocking scripts and content based on various criteria.

Open-source: NoScript is open-source software, which means that the code is freely available for inspection and modification.


Potential compatibility issues: NoScript can cause compatibility issues with some websites, as it may block scripts or content that is necessary for the site to function properly.

Configuration may be complex: Configuring NoScript to work with specific sites may require some technical knowledge, which may be challenging for less experienced users.


Overall, NoScript is a powerful and effective tool for enhancing the security of the Firefox web browser. While it may require some configuration and may cause compatibility issues with some sites, the benefits of using NoScript to protect against web-based attacks make it a valuable addition to any user’s online security toolkit.

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