How to Turn On Javascript in Firefox

JavaScript controls in Firefox are in the Tools / Options menu (see Tools / Options image).

Once you get the Options menu, click on the Content tab. This is the screen you'll see.

Put a check in the "Enable JavaScript" checkbox.

Then, click on the Advanced button to the right on the same line, and you'll get another series of checkboxes to control whether Firefox lets JavaScript do certain things or not. Notice that I have all of the boxes unchecked. This is my preferred, more secure setting.

Check or uncheck the boxes you want (I want them all unchecked) and then click the OK button.

Click the OK button on the Options window.

Now, you should be all set, with JavaScript operational in Firefox.

Please note that some other programs also may attempt to control whether JavaScript works or not. Sunbelt Personal Firewall, which I use, is an example of a firewall program that can allow or prevent JavaScript execution by the browser. However, I have turned off the functions that prevent JavaScript or to block advertising.

Note that Java and JavaScript are not the same thing. Although they can both be used with web pages, their common feature is the four characters J a v a.

On a final note, JavaScript is a language. Each browser (IE, Firefox, Opera, etc.) has its own JavaScript interpreter that takes the JavaScript commands that are in a web page, and then executes them.

Just because one web browser does not handle a JavaScript function securely does not make JavaScript insecure — it is simply another example of a problem with an individual web browser.