Facebook does not distribute the Handler as an APK. It is bundled within:
If you are still using an Android 6.0 device (e.g., as a burner phone, media player, or testing device), here are practical solutions. Facebook Handler Apk Android 23
To understand the Handler’s behavior, we must revisit Android 6.0 Marshmallow (API 23), released in October 2015. This version introduced two revolutionary changes that directly impact how the Facebook Handler operates. Facebook does not distribute the Handler as an APK
Surprisingly, the handler requires the "Phone" permission to read your device's unique ID for security verification. When an Intent arrives:
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When an Intent arrives: