This add-on strictly operates locally within your browser. We do not collect, store, transmit, or share any of your personal information, browsing history, or UMS account data to any third-party servers. All data processing (including calculating GPA and formatting calendars) is done locally on your device. For the Google Calendar synchronization feature, the extension communicates directly with Google's API using standard OAuth2 protocols, and we do not intercept or store your Google credentials.