Examine source code of YouTube Full Captions

{
  "manifest_version": 3,
  "name": "YouTube Full Captions",
  "version": "1.0.0.1",
  "description": "Enhances YouTube's auto-generated subtitles to display line by line instead of word by word, for improved readability.",
  "author": "Oded Streigold",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "action": {
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png",
      "128": "images/icon-128.png"
    },
    "default_title": "YouTube Full Captions — OFF (click to turn ON)"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "scripting",
    "activeTab",
    "tabs",
    "storage",
    "contextMenus"
  ],
  "host_permissions": [
    "*://*.youtube.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "settings.html",
        "settings.js",
        "settings.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-full-captions@odedstreigold",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "128.0"
    }
  }
}