Examine source code of MusicFox

{
  "manifest_version": 2,
  "name": "MusicFox",
  "description": "Integrates Spotify, Youtube Music, and Soundcloud from the browser",
  "version": "1.12",
  "applications": {
    "gecko": {
      "strict_min_version": "60.0"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "sidebar_action": {
    "default_icon": {
      "48": "icons/icon1_48.png",
      "96": "icons/icon1_96.png"
    },
    "default_title": "MusicFox",
    "default_panel": "sidebar/sidebar.html"
  },
  "icons": {
    "96": "icons/icon2_96.png"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+M"
      },
      "description": "Toggle the MusicFox sidebar"
    }
  }
}