Examine source code of Youtube Caption Reader

{
  "manifest_version": 3,
  "name": "Youtube Caption Reader",
  "version": "1.0",
  "description": "Display captions of youtube videos to quickly skim through the content",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "src/main.js"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "ytCaption.js"
      ]
    }
  ],
  "host_permissions": [
    "*://*.youtube.com/*"
  ],
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "kfevinvun@gmail.com"
    }
  }
}