For me it mucked up Firefox, giving me "Enable Firefox" (already enabled) and forcing Firefox to ask for permission to open each site. I mention this to give the head's up. BUT as someone wiser said, it's "an awesome addon, [but] you have to be extremely careful with it. It can really mess up your web experience if you don't know how to use it."

It breaks YouTube even if it's trusted.

My review was removed. The latest update removed all settings, all sites that were whitelisted reverted to default i.e. untrusted, a hassle to restore since so many sites have a ridiculous amount of domains with cdn's and whatnot. I have now disabled automatic updates of this add-on because some (most) devs don't care if an "update" wreaks havoc as long as they get to constantly change something in their code, "if it aint broke, break it!" as their motto is.

It works great if you want to type a search in the search bar and expect NO results, just a blank page. Also youtube will not work at all with No Script Security Suite turned on.

It was OK for years. I trusted FedEx but it will not load now. I am unable to see when a package will be delivered. Saying it is a privileged page and I can't change it. I'm going to uninstsll it. I have to be able to see these pages so nosscipt is now nomore.

NoScript is a nice idea on paper but actual use is such an effort that it exceeds its apparent benefit. This app needs a feature so that the community of users can contribute to what features on a web site need to be refused and which are acceptable. For each user to have to go over this mountain of work is rediculous.

Settings lose after restart if duckduckgo installed.

Totally broken since the last update, I switched from release to ESR because I couldn't find the issue why Firefox became unusable after a few hours getting slower and eating up resources like crazy. In ESR I still had the issue that refreshing a page resulted in a lot of pages displaying without CSS or JavaScript looking like they're comming from the 90s, after a few days.

Doesn't save per-site permissions now.

the new UI is totally messed up. How about an option to use the old UI? The text in the new UI is too large, lines wrap and are almost unreadable, the colors are ugly. NoScript is a great security tool for Firefox, but this new UI is the worst.