Yes, 100% safe. WiCanFi is built from the ground up on a strict Zero-Knowledge Security Architecture:
Your student ID / username and password are saved only inside your browser's private local sandbox (
chrome.storage.local). They exist solely on your physical computer and are never synced to any cloud database or remote analytics server.
When logging in, the extension communicates directly and only with your college's official captive portal gateway (http://172.16.16.16:8090/). No intermediary server ever intercepts or touches your Wi-Fi credentials.