NoScript

The first thing you need to know is that NoScript Security Suite (or NoScript for short) is an add-on for Firefox, SeaMonkey, and other Mozilla-based web browsers. The second thing you need to know is that NoScript is free and open source software. And the third thing you need to know is what NoScript can do: only trusted websites are allowed to execute JavaScript, Java, Flash, and other plugins. So to recap, NoScript is a free add-on for Firefox, add-on that offers anti-XSS and anti-clickjacking protection, add-on that prevents the exploitation of security vulnerabilities.

As InformAction explained, NoScript provides support for Firefox 3.0 and above, SeaMonkey 2.0 and above, IceWeasel, and Minefield. “Other browsers based on Gecko 1.9.0 and above might work, but are not tested.”
Once you’re done installing NoScript, you will be directed to a webpage that invites you to check out a video presentation, learn more about NoScript’s features, and read the NoScript FAQ.

On Firefox 32, the latest Firefox version at the time of writing this, you will find NoScript in the upper right hand corner. By default, the NoScript icon is displayed in the upper right hand corner of the browser’s interface. You can use the Customize Firefox option to take the NoScript icon and place it somewhere else.

NoScript notifications are displayed down at the bottom of the browser’s interface; an Options button is displayed in the bottom right hand corner.
From the Options menu, the Appearance submenu, you can choose what elements NoScript displays on its interface.

With NoScript by your side, only trusted websites are allowed to execute JavaScript, Java, Flash, and other plugins. Only the websites that you specify are allowed to execute scripts. This is great from a security point of view – it prevents the exploitation of security vulnerabilities, it protects against XSS and clickjacking.

NoScript is free and open source software. Support it by making a donation to InformAction.

Experts say that NoScript makes Firefox safer and I wholeheartedly agree. Get this add-on and make sure that only trusted websites are allowed to run scripts.