Is Fake Filler safe?

Legitimate form-filling extension with Firebase authentication for premium features. The static analyzer detected 15 exfiltration flows, but these are false positives: all detected flows are part of Firebase Authentication/Firestore SDK operations for syncing user settings (options configurations) to the cloud, not exfiltrating form data. The extension only reads cookies via Firebase's authentication mechanism, uses postMessage for internal React component communication, and has remote config limited to authenticated users' personal settings stored in Firestore. Form data generated by the extension never leaves the page.