Based on the following, I will keep the SS active.

“Script shield - detects malicious scripts and prevents them from being run. The script shield will detect and block not only malicious scripts coming from the web (remote threats) but also scripts coming from other sources, such as web pages saved to disk or in the browser cache etc (local threats).
Unlike the web shield, the script shield can also detect and block malicious scripts that come from HTTPS (encrypted) connections.”