Examine source code of HotGato Speed Reader

{
  "manifest_version": 3,
  "name": "HotGato Speed Reader",
  "version": "1.12",
  "description": "Speed read any website or paragraph with HotGato.",
  "author": "Robert Allen of ZingLab",
  "permissions": [
    "contextMenus",
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "hotgato_16.png",
      "48": "hotgato_48.png",
      "128": "hotgato_128.png"
    },
    "default_title": "HotGato Speed Reader"
  },
  "icons": {
    "16": "hotgato_16.png",
    "48": "hotgato_48.png",
    "128": "hotgato_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "core.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "index.html",
        "style.css",
        "hotgato_128.jpg"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4daacd5f-1d77-4cc2-b71d-217878a519d3}",
      "strict_min_version": "109.0"
    }
  }
}