Email Open Tracker - Minimalist Edition

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Gmail toolbar counter - A live pill appears directly in the Gmail thread toolbar — showing total opens at a glance while you're reading the conversation. Full activity timeline - Every open event across all your tracked emails, in one place. Scroll through your history, filter by thread, and see the full picture. Proof of receipt PDF - Generate a timestamped certificate for any tracked thread. Useful when you need to prove an email was received and read.