Is Utregning av karaktersnitt for studentweb safe?

Calculates grade averages directly on Studentweb results pages.

This extension automatically runs when you open results in Studentweb and displays your grade average on the page. You can exclude selected grades from the calculation, and the store description says the calculation happens locally in the browser. It is intended for Norwegian universities such as NTNU, UiO, UiB, and UiT.