Examine source code of FireNotes

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "version": "1.2",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "permissions": [
    "clipboardWrite"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "sidebar_action": {
    "default_title": "FireNotes",
    "default_panel": "popup/editor/sidebar/index.html",
    "default_icon": "icons/icon-48.png",
    "open_at_install": false
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Alt+N"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fire-notes@elmees21"
    }
  }
}