Is FB unseen safe?

Clean risk

This extension blocks Facebook Messenger read receipts from being sent.

It prevents Facebook chat messages from being marked as read automatically, so contacts do not see a read receipt when you open a message. It also lets you manually mark a message as read. The extension uses web request blocking on facebook.com and messenger.com to provide this behavior.

HorizonsoftFirefox Add-ons
0Risk
Who publishes it

Horizonsoft - no other listings under this identity

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
Horizonsoft

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

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Updated 15 October 2026amo-713065