Is Script Blocker Ultimate (NoScript,Disable JS) safe?

Blocks or allows JavaScript on websites using global modes plus whitelist and blacklist rules.

This extension lets you choose whether to allow all scripts, block all scripts, block scripts except on whitelisted sites, or allow scripts except on blacklisted sites. You can add domain rules for whitelist and blacklist entries, including wildcard patterns such as *.google.com. Blocking JavaScript may affect how some web pages work, and whitelisting can be used for pages that need scripts.