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How to enable or disable Javascript in Firefox?

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  • 3 min read

Javascript is a widely used scripting programming language, which makes the webpage more responsive and interactive so that you can have a better end experience. For example, Javascript can help you check username availability or autocomplete sentences.

Other functions that Javascript performs are fixing the layouts of the webpage or facilitating the lazy loading of the web page in case the network connection is poor. Moreover, it can also help flash instant information, such as breaking news or stock market updates.

In this article, we will explain how you can enable or disable Javascript in Firefox.

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How to enable or disable Javascript in Firefox?

To enable or disable Javascript in Firefox, follow the instructions below. The steps would also work on Firefox browser apps for Android and iOS.

Step 1: Type about:config in the address bar. (Take a look at the screenshot above to get an idea). You will receive a warning: Proceed with Caution as Changing advanced configuration preferences can impact Firefox performance and security. Just click on Accept the Risk and Continue. (If you do not want to receive the warning in the future, you can opt out of the notification by removing the tick mark beside Warn me when I attempt to access these preferences).

Step 2: Once you have entered the configuration zone, enter java.enabled in the search box.

Step 3: The option is set to true by default, meaning the Javascript is enabled. To disable it, double-click the option, and it will become false (As shown in the screenshot below).

Thus, following the above steps, you can easily enable or disable the Javascript in Firefox.

Also Read: How to delete the browsing history in Firefox?

Advantages of Javascript in Firefox

Here are the advantages of Javascript in Firefox:

  • Speed: Javascript is a client-side language. So it does not have to contact the servers to perform a task.
  • Simplicity: Javascript has a simple syntax and is easy to learn and write. You can use the in-built developer tools to test the codes.
  • Popularity: Javascript has a wide library and is quite popular. As such, you can take the help of a large and thriving Javascript community on the internet. Firefox supports Javascript libraries such as jQuery, React, Angular, and Vue.
  • Interoperability: Javascript can work with languages such as HTML, CSS, XML, JSON, etc.
  • Versatility: You can use Javascript for both front and back-end development. Also, Javascript can be used on computer and mobile applications.

Disadvantages of Javascript in Firefox

Although the advantages are many, Javascript also has some disadvantages:

  • Client-side security: Javascript is vulnerable to cyberattacks such as cross-site scripting (XSS), where hackers can inject malicious code.
  • Browser support: Javascript can have some consistency issues, especially for older and less popular browsers.
  • Code visibility: The Javascript code is visible to everyone; hence, they can copy and modify it.

Also read: How to bookmark all tabs in Firefox?

Kumar Hemant

Kumar Hemant

Deputy Editor at Candid.Technology. Hemant writes at the intersection of tech and culture and has a keen interest in science, social issues and international relations. You can contact him here: