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.