Can I use the Messenger service to send files or images, and are there size limits for these attachments?
Are group chats supported on the Messenger service, and is there a limit to the number of participants?
Does the Messenger service offer end-to-end encryption for all messages, and how does it work?
Can I access and use the Messenger service on multiple devices simultaneously, and how is message synchronization managed across those devices?
How can I initiate a chat with someone who is not on my friends list in Messenger?
What security and privacy features does Messenger offer to protect my conversations?
Is it possible to customize chat notifications for specific contacts or groups in Messenger?
Can I use Messenger to make voice and video calls, and what are the requirements for doing so?
How does Messenger integrate with other Facebook services, and are there any limitations to this integration?
How does Facebook Messenger ensure the privacy and security of its users' messages and data?
