Examine source code of Structured Start Tab

{
  "manifest_version": 3,
  "version": "1.11.0.1",
  "version_name": "1.11.0-beta",
  "name": "Structured Start Tab (Beta)",
  "description": "Show a structured page when a new tab is opened.",
  "author": "Rich Boakes",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e7f2c10-a249-4273-a00e-de596b95ef22}",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "bookmarks",
    "favicon",
    "contextMenus",
    "topSites",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/js/background.js"
    ]
  },
  "icons": {
    "16": "src/style/i/16.png",
    "48": "src/style/i/48.png",
    "96": "src/style/i/96.png",
    "128": "src/style/i/128.png",
    "580": "src/style/i/580.png"
  },
  "action": {
    "default_icon": "src/style/i/48.png"
  },
  "chrome_url_overrides": {
    "newtab": "src/index.html"
  },
  "options_ui": {
    "page": "src/pages/options/index.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "data/*",
        "chrome://settings/strings.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "commands": {
    "toggle-sidebar": {
      "suggested_key": {
        "default": "Ctrl+Shift+B",
        "mac": "MacCtrl+Shift+B"
      },
      "description": "Toggle Sidebar"
    },
    "toggle-heatmap": {
      "suggested_key": {
        "default": "Ctrl+Shift+I",
        "mac": "MacCtrl+Shift+I"
      },
      "description": "Toggle HeatMap"
    },
    "toggle-presentation": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "MacCtrl+Shift+L"
      },
      "description": "Toggle presentation mode"
    }
  }
}