Examine source code of osmos::memo

{
  "name": "osmos::memo",
  "version": "2.4.1",
  "description": "An in-browser bookmark manager with easy tagging and fast recall",
  "manifest_version": 2,
  "browser_action": {
    "default_title": "osmos::memo",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "assets/osmosmemo-icon-16.png",
      "24": "assets/osmosmemo-icon-24.png",
      "32": "assets/osmosmemo-icon-32.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "48": "assets/osmosmemo-icon-48.png",
    "96": "assets/osmosmemo-icon-96.png",
    "128": "assets/osmosmemo-icon-128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "osmosmemo@osmoscraft.org"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+D"
      },
      "description": "Capture current page"
    }
  }
}