Facebook just launched chat extensions and opened the original extension of the TaskBot example, which works in a chat between two people. The Github repository is here , and the white papers are here .
I tried to play with him. Works great in a mobile application. But not in a web application (via messenger.com). When I try to edit the task list, I am redirected to the page https://messenger-taskbot.herokuapp.com/lists/ {id}, and I have the following message:
So, I think the browser will not have chat extensions for messenger.com yet?