Messenger pin message - A web app for organizing and prioritizing Facebook messages
If you like to keep online conversations organized, you can use this extension to pin important messages in the messenger conversation. It's very easy to use: You need to click on a particular message you want to pin, and then you will get an option of pinning that message on the right-side panel. So when you do copy that message into your clipboard, it will automatically be posted by this extension. You can also be sure of your privacy since it ensures that you are the only one that can see your pinned messages. Lastly, it comes in handy when you want to share links with your friends too!
