Examine source code of (Dark) Mind Maps

{
  "manifest_version": 2,
  "name": "Mind Maps",
  "version": "1.0",
  "description": "The clear way to share complex information with collaborative mind maps",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "images/midmap-logo.png"
    }
  },
  "icons": {
    "128": "images/midmap-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{807cf134-79dc-487d-9024-804a2d203f38}"
    }
  }
}