Moved from mozilla/libdweb#46

Objective

Create a pair of Add-ons, one for the teacher, another for students, for helping educational activities in a classroom such as guided browsing, chatting, polling/quiz.

Teacher Add-on

The teacher would be able to do the following actions:

• Open an URL in one, a subset, or all students machine.
• Send and reply to questions from students (privately).
• Participate in group chat.
• Highlight part of a page for the students.
• Check which students are present.
• Send polls/questions to all students.

Student Add-on

The students would be able to:

• Chat with each other.
• Send questions to the teacher.
• Answer polls/quiz.

Suggested usage of Libdweb APIs:

• Use UDP for:
  • discovering peers on the network.'
  • multicasting messages to a group chat.
  • open the same page on all machines.
  • send info to highlight some element on the page.
  • check who is on class
• Use TCP for:
  • Interact directly with the teacher.
• Reply to poll/quiz

Suggested strategy

Programming this should be easy, the hardest part is actually building a good UX that is pleasant and gets out of the way. A background script could handle peering and presence check, opening pages. A Sidebar can be used for the chat. A new tab with a content script can handle the interaction with the teacher. A browser action with a popup menu with the possible actions for each role can be the main entry point for the add-on. WebExtension storage can be used to save student data.