The addon automatically blocks all such content, but there may well be occasions when you need it to run. When you encounter such as site, you can easily add it to a whitelist so that scripts will be allowed to run now and in the future - ideal for banking and shopping sites.
You can choose to be notified when a script is blocked, so should a site fail to function as expected you can opt to enable individual page elements as required. The settings you choose to use can be quickly backed up by saving them as a bookmark so they can be restored when you have to reinstall, or transferred to another computer.
With hardly any user intervention required, NoScript offers a superb level of protection against site borne security threats and ensures that you have full control over what is allowed to run in your browser window.
Version 18.104.22.168 (changelog):
x [WebExt] Fixed incompatibility with Firefox 54
x [WebExt] Initiated preference migration via embedded
x [e10s] Fixed HTTP redirection issues with e10s enabled
(thanks PLD for reporting)
x [Surrogate] Updated googletag replacement (thanks barbaz)
x Fixed HTML5 Media documents blockage delay if no other
embedded content is forbidden (thanks Georg Koppen for
x [XSS] Fixed bug causing false positives (thanks Georg
Koppen for reporting)
A small and simple addon that places you firmly in control of the web sites you visit