Is GMX MailCheck for Firefox safe?

Unknown risk

GMX MailCheck for Firefox ships hardcoded OAuth2 client secrets and may silently enable telemetry during version upgrades.

1&1 Mail & Media GmbHv8.0.18Chrome Web Store
0Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Updated 17 June 2026amo-229925