Messenger Keyboard is a free Chrome add-on developed by Lubien. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This handy tool allows you to navigate between chats in Messenger using only your keyboard.

With Messenger Keyboard, you can streamline your chat experience by utilizing keyboard shortcuts. By pressing Esc, a blue cursor appears, indicating that you are now in keyboard navigation mode. From there, you can use the up and down arrow keys (▲ and ▼) to move between chats effortlessly. Additionally, you can jump to the first chat by pressing the left arrow key (◄) or to the last loaded chat by pressing the right arrow key (►).

To open a chat, simply hit Enter. If you want to stop moving between chats, press Esc again. If you are familiar with vim, you will also appreciate the inclusion of vim-styled mappings 'j' and 'k' to move between chats.