Disable javascript in Firefox

How to disable javascript in FIrefox 23?

In Firefox 23, as part of an effort to simplify the Firefox options set and protect users from unintentially damaging their Firefox, the option to disable JavaScript was removed from the Firefox Options window.

However, the option to disable JavaScript was not removed from Firefox entirely. You can still access it from about:config or by installing an add-on.

Disable javascript using about:config

Step 1: In the address bar, type “about:config” (with no quotes), and press Enter.
Step 2: Click “I’ll be careful, I promise”

Firefox Warning
Firefox Warning

Step 3: In the search bar, search for “javascript.enabled” (with no quotes).


Step 4: Right click the result named “javascript.enabled” and click “Toggle”. JavaScript is now disabled.


Javascript Disabled
Javascript Disabled

To Re-enable JavaScript, repeat these steps.

Disable javascript using Add-ons

You can alternatively install an add-on that lets you disable JavaScript, such as

No-Script (to disable JavaScript on a per page basis, as required)
QuickJava (to easily disable and enable JavaScript, automatic loading of images, and other content)
SettingSanity (adds back removed options for JavaScript, Advanced JavaScript Settings, loading images, and showing the Tab Bar)

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