Examine source code of Text to speech that brings productivity

{
  "manifest_version": 2,
  "default_locale": "en",
  "short_name": "Intelligent Speaker",
  "name": "Text to speech that brings productivity",
  "description": "__MSG_appDesc__",
  "homepage_url": "https://intelligent-speaker.com",
  "content_security_policy": "default-src 'self'; script-src 'self' https://ssl.google-analytics.com; img-src * data:; media-src https://intelligent-speaker.com https://intelligentspeaker.s3.amazonaws.com blob:; connect-src https://intelligentspeaker.auth.us-east-1.amazoncognito.com https://intelligent-speaker.com/voice-preview/ https://mjqj47yt17.execute-api.us-east-1.amazonaws.com https://api.intelligent-speaker.com https://intelligentspeaker.s3.amazonaws.com https://input-files-for-tts.s3.amazonaws.com https://auth.intelligent-speaker.com; style-src https://fonts.googleapis.com; font-src https://fonts.gstatic.com/;",
  "applications": {
    "gecko": {
      "id": "{a5a46bdd-75dd-4478-a420-0682ae132270}",
      "strict_min_version": "58.0"
    }
  },
  "version": "2022.5.25.1008",
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "downloads"
  ],
  "optional_permissions": [],
  "browser_action": {
    "default_icon": {
      "128": "images/logo/logo128.png"
    },
    "default_popup": "popup.html"
  },
  "icons": {
    "128": "images/logo/logo128.png"
  },
  "background": {
    "page": "eventPage.html"
  },
  "commands": {
    "addToFeedStarter": {
      "suggested_key": {
        "default": "Ctrl+Shift+A",
        "mac": "MacCtrl+Shift+A"
      },
      "description": "__MSG_addToFeed__"
    },
    "listenToggle": {
      "suggested_key": {
        "default": "Alt+P"
      },
      "description": "__MSG_playPause__"
    },
    "nextArticle": {
      "description": "__MSG_nextArticle__"
    },
    "nextChunk": {
      "suggested_key": {
        "default": "Alt+N"
      },
      "description": "__MSG_nextChunk__"
    },
    "prevArticle": {
      "description": "__MSG_prevArticle__"
    },
    "prevChunk": {
      "suggested_key": {
        "default": "Alt+B"
      },
      "description": "__MSG_prevChunk__"
    },
    "speedIncrease": {
      "description": "__MSG_playbackRateIncrease__"
    },
    "speedDecrease": {
      "description": "__MSG_playbackRateDecrease__"
    }
  },
  "incognito": "not_allowed",
  "author": "Intelligent Speaker"
}