How to disable JavaScript in Firefox 23 and above

firefox disable javascript

The Mozilla team, which develops the popular Firefox browser, introduced new simplified browser settings with the release of version 23.  One of the settings which disappeared from the user interface is the one to control JavaScript. In previous versions of the browser, you were able to enable or disable JavaScript with a simple checkbox. But, starting with version 23, Firefox does not have it any more. Mozilla claims that most modern websites are unusable without JavaScript.

Today we will look at why you might want to disable JavaScript in Firefox and how you do it.

Why you may have to disable JavaScript in Firefox

Actually, there is no need to go out of your way to disable JavaScript. To some extent, I agree with the developers of Firefox  - most websites look less attractive without JavaScript. Some features like animations or captcha may entirely stop working.

However, there are several situations when you may need to disable JavaScript.  This includes annoying Javascript-based popups, which appear on many websites. Also, scripting can be used to modify your clipboard content or the page right click menu.  If you need to avoid such annoying behaviors like popups, protect your clipboard content or need to right click on websites which disable such behavior, you may want to disable JavaScript.

Or, if you are a web developer, you may want to test how your website looks with JavaScript disabled.

How to disable JavaScript in the latest versions of Firefox

To disable the JavaScript feature, follow this simple procedure:

1. In the address bar of Firefox, type the following:


Click the "I will be careful, I promise!" button.
2. The list of all configurable settings in Firefox will appear in the current tab. At the top of the list, you will see the "Search" textbox. Type there "javascript" without quotes.
3. Locate the "javascript.enabled" option and set it to:
true - if you need to keep JavaScript enabled.
false - if you need to keep JavaScript disabled.

To change the option's value, you just need to double click on it.

That's it. As you can see, it is still possible to change the JavaScript state and it's pretty easy to do so.

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Author: Sergey Tkachenko

Sergey Tkachenko is a software developer who started Winaero back in 2011. On this blog, Sergey is writing about everything connected to Microsoft, Windows and popular software. Follow him on Telegram, Twitter, and YouTube.

3 thoughts on “How to disable JavaScript in Firefox 23 and above”

  1. How utterly presumptuous firefox has become! Always deciding/dictating what the end-user will be allowed to do.
    No wonder people are dumping it right and left.

  2. Thank you !

    I need to stop an abusive fraud window that would not close. I’ll install no-script to make it simpler next time.

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