NoScript Security Suite – Get this Extension for 🦊 Firefox (en-US)
addons.mozilla.org
Download NoScript Security Suite for Firefox. The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.

NoScript add-on is great for disabling any scripts running on a page. The user can view the domains the scripts are running from and enable them individually.

At first it breaks every web page you visit but after a little time white-listing everything runs fine and it makes for much cleaner browsing.