Has it been while since you've chatted with a Messenger bot? If you use Pinterest religiously, you might be tempted pick up the habit again. The visual discovery social network has launched a Messenger bot and a chat extension that make it easier to share pins with friends. With the chat extension, you'll be able to share pins from Pinterest within the Messenger app itself. And if you receive a pin from your friend, you'll be able to expand that pin to show the full image and browse related pins without even leaving the chat application. Pinterest says it built the extension to load fast, since it expects people to use it on the go.