This is because it is not the default setting: the default setting is for 'javascript.enabled' to be 'true'. If you have JavaScript disabled, you should notice that it will be shown in bold text. One of the settings which you can see should be called ' javascript.enabled' in the ' Preference Name' column.

Find the 'javascript.enabled' preference.

As you type this, Firefox will reduce the number of settings shown until just the JavaScript based settings appear.

Type 'javascript' into the search fieldīecause there are so many settings, the easiest way to find the JavaScript setting is to start to type 'javascript' into the search box.

I recommend keeping this box ticked to remind you each time! This warning will appear each time you visit about:config unless you untick the ' Warn me when I attempt to access these preferences' checkbox. Click the ' Accept the Risk and Continue' button.

Accept the warning about changing advanced settingsīecause about:config will give you lots of advanced options which can potentially mess up Firefox, you will be warned about not changing anything you're not sure about.

You do not need to put in or www or anything like that simply put about:config and press the Enter key on your keyboard. In the address bar, type in about:config and press enter. Start by clicking into the Address Bar at the top of your Firefox window.

The more advanced settings for Firefox are only available by visiting a special url.

This guide will step you through the process of enabling JavaScript in Firefox.

No option to enable java in firefox