Examine source code of FLOW PAGE （text to speech , Android compatible）

{
  "manifest_version": 3,
  "name": "__MSG_ExtensionName__",
  "version": "1.2.3",
  "description": "__MSG_ExtensionDescription__",
  "default_locale": "en",
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "storage",
    "activeTab"
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "flowpage@lifenote.tokyo"
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "FlowPage.js",
        "qrcode.min.js"
      ],
      "css": [
        "flowpage.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "service-worker.js"
    ]
  },
  "icons": {
    "16": "icons/FlowPage-Icon small 16.png",
    "24": "icons/FlowPage-Icon small 24.png",
    "32": "icons/FlowPage-IconSmall.png",
    "48": "icons/FlowPage-Icon 48.png",
    "96": "icons/FlowPage-Icon 96.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "images/*",
        "FPshareUS.html",
        "FPshareJA.html",
        "FPshareZh.html",
        "FPshareKo.html",
        "FlowPage.js",
        "qrcode.min.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "extension_ids": [
        "flowpage@lifenote.tokyo"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "icons/FlowPage-Icon small 16.png",
      "24": "icons/FlowPage-Icon small 24.png",
      "32": "icons/FlowPage-IconSmall.png"
    }
  }
}