Examine source code of NaturalReader - AI Text to Speech

{
  "manifest_version" : 3 ,
  "name" : "NaturalReader - AI Text to Speech",
  "version" : "3.1.1",
  "description" : "Turn text into speech with natural AI voices. Read webpages, PDFs, Google Docs, Kindle, and email aloud with a handy reading bar and",
  "icons" : {
    "32" : "assets/img/32N.png",
    "48" : "assets/img/48N.png",
    "128" : "assets/img/128N.png"
  },
  "action" : {
    "default_title" : "Open Reading Bar",
    "default_icon" : {
      "32" : "assets/img/32N.png",
      "48" : "assets/img/48N.png",
      "128" : "assets/img/128N.png"
    }
  },
  "sidebar_action": {
    "default_title" : "NaturalReader Reading Bar",
    "default_panel": "injected/nr-ext-reading-bar/sidepanel.html",
    "default_icon" : {
      "32" : "assets/img/32N.png",
      "48" : "assets/img/48N.png",
      "128" : "assets/img/128N.png"
    },
    "open_at_install": false
  },
  "commands" : {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      }
    },
    "play": {
      "description" : "Pause/Resume",
      "suggested_key": {
        "default": "Alt+P"
      }
    },
    "forward": {
      "description" : "Next"
    },
    "rewind": {
      "description" : "Previous"
    },
    "speaker": {
      "suggested_key": {
        "default": "Alt+S"
      },
      "description" : "Speaker"
    },
    "toggleShowReadIcon": {
      "description" : "Toggle Show Read Selection Icon"
    },
    "goToTabBeingRead": {
      "description" : "Go to Tab Being Read"
    },
    "readSelection": {
      "description" : "Highlight to Read"
    },
    "stop": {
      "description" : "Stop"
    }
  },
  "background" : {
    "scripts" : [
      "background/firefox-compat.js" ,
      "background/chromeRuntimeMessage.js" ,
      "background/utils.js" ,
      "background/pdf.js" ,
      "background/storage.js" ,
      "background/alert-handler.js" ,
      "background/script-injector.js" ,
      "background/amplify-config.js" ,
      "background/pe.js" ,
      "background/auth.js" ,
      "background/extension.js" ,
      "background/reading-bar.js" ,
      "background/reader.js" ,
      "background/context.js" ,
      "background/convert.js" ,
      "background/prorate.js" ,
      "background/online-tts.js" ,
      "background/voice-cloning.js" ,
      "background/capture.js" ,
      "background/ocr.js" ,
      "background/bootstrap.js" 
    ]
  },
  "permissions" : [
    "scripting" ,
    "activeTab" ,
    "contextMenus" ,
    "storage" ,
    "webNavigation" ,
    "tabs" ,
    "declarativeNetRequest" 
  ],
  "host_permissions" : [
    "<all_urls>" 
  ],
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "css" : [
        "injected/nr-ext-dom/nr-ext-dom.css" 
      ]
    },
    {
      "matches" : [
        "*://*.naturalreaders.com/login-service/*" 
      ],
      "js" : [
        "injected/nr-ext-auth.js" 
      ],
      "all_frames" : true 
    }
  ],
  "content_security_policy" : {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "web_accessible_resources" : [
    {
      "resources" : [
        "assets/*" ,
        "injected/*" ,
        "download/*" ,
        "side-panel/*" ,
        "libs/*" 
      ],
      "matches" : [
        "<all_urls>" 
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{af82e4f4-6698-4da2-8654-37edd70b2c52}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "browsingActivity",
          "websiteContent"
        ],
        "optional": []
      }
    }
  }
}