Examine source code of Tabthrough — live demo presenter

{
  "manifest_version": 3,
  "name": "Tabthrough — live demo presenter",
  "short_name": "Tabthrough",
  "version": "0.2.1",
  "description": "An interactive agenda that drives your tabs during live demos. Live demos, on rails.",
  "homepage_url": "https://tabthrough.com",
  "author": "Patryk Hadasz",
  "browser_specific_settings": {
    "gecko": {
      "id": "tabthrough@tabthrough.com",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "identity"
  ],
  "host_permissions": [
    "https://identitytoolkit.googleapis.com/*",
    "https://securetoken.googleapis.com/*",
    "https://europe-west1-tabthrough.cloudfunctions.net/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Tabthrough",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.min.js",
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "commands": {
    "next-step": {
      "suggested_key": {
        "default": "Ctrl+Right",
        "mac": "Command+Right"
      },
      "description": "Next step in the agenda"
    },
    "prev-step": {
      "suggested_key": {
        "default": "Ctrl+Left",
        "mac": "Command+Left"
      },
      "description": "Previous step in the agenda"
    },
    "toggle-presenter": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "Command+Shift+P"
      },
      "description": "Toggle presenter window"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}