Examine source code of Kokoro Reader

{
  "manifest_version": 3,
  "name": "Kokoro Reader",
  "version": "1.1.3",
  "description": "Send text from browser to Kokoro-FastAPI for TTS generation",
  "permissions": [
    "contextMenus",
    "storage",
    "activeTab",
    "notifications",
    "scripting",
    "downloads"
  ],
  "host_permissions": [
    "http://127.0.0.1/*",
    "http://localhost/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.min.js",
        "readability.js",
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "overlay.html",
        "overlay.js",
        "text-processor.js",
        "audio-manager.js",
        "dom-utils.js",
        "browser-polyfill.min.js",
        "compromise.js",
        "compromise-dates.min.js",
        "compromise-numbers.min.js",
        "transliteration-lite.js",
        "purify.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "commands": {
    "toggle-playback": {
      "suggested_key": {
        "default": "Alt+K"
      },
      "description": "Play/Pause / Start Reading"
    },
    "nav-next": {
      "suggested_key": {
        "default": "Alt+Period"
      },
      "description": "Next Sentence"
    },
    "nav-prev": {
      "suggested_key": {
        "default": "Alt+Comma"
      },
      "description": "Previous Sentence"
    },
    "read-article": {
      "suggested_key": {
        "default": "Alt+R"
      },
      "description": "Read Article with Kokoro TTS"
    },
    "close-overlay": {
      "suggested_key": {
        "default": "Alt+W"
      },
      "description": "Close Overlay"
    }
  },
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kokoro-reader@tiger",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}