Very difficult to come up with key combinations which don't conflict with *something*. Can we expand the secondary modifier list to include Alt, Ctrl, Command, MacCtrl? Also other non-alphanumeric characters besides Comma, Period would be good.

This has been added to the agenda for the WebExtensions APIs triage on April 10, 2018. All who are interested in this bug are welcome to join. Here’s a quick overview of what to expect at the triage: * We normally spend 5 minutes per bug * The more information in the bug, the better * The goal of the triage is to give a general thumbs up or thumbs down on a proposal; we won't be going deep into implementation details Relevant Links: * Wiki for the meeting: https://wiki.mozilla.org/WebExtensions/Triage#Next_Meeting * Meeting agenda: https://docs.google.com/document/d/1cFcqNOLwp77aosh5QUeNKgW8FQONAzOBlqjbcbxdIXw/edit# * Vision doc for WebExtensions: https://wiki.mozilla.org/WebExtensions/Vision

NI'ing Luca for follow-up.