Examine source code of Genuine Reader Mode

{
  "name": "Genuine Reader Mode",
  "version": "1.0",
  "manifest_version": 3,
  "minimum_chrome_version": "88.0",
  "default_locale": "en",
  "description": "Determine the content and title of a page, and the zoom in to make view easier. It is the Genuine Reader Mode",
  "homepage_url": "http://genuinereader.com",
  "icons": {
    "16": "src/assets/icons/app/icon-16.png",
    "48": "src/assets/icons/app/icon-48.png",
    "128": "src/assets/icons/app/icon-128.png"
  },
  "action": {
    "default_icon": {
      "16": "src/assets/icons/app/icon-16.png",
      "32": "src/assets/icons/app/icon-48.png",
      "40": "src/assets/icons/app/icon-40.png"
    },
    "default_title": "Genunie Reader Mode"
  },
  "permissions": [
    "contextMenus",
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "src/background/script.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "*://localhost/*",
        "*://mail.google.com/*",
        "*://*.github.com/*",
        "*://www.linkedin.com/feed",
        "*://chat.openai.com/chat",
        "*://www.youtube.com/",
        "*://calendar.google.com/*",
        "*://docs.google.com/*",
        "*://www.google.com/search?*",
        "*://drive.google.com/*",
        "*://mail.yahoo.com/*",
        "*://*.ixigua.com/*",
        "*://*.bing.com/*",
        "https://www.google.com/",
        "https://www.google.com/maps/"
      ],
      "run_at": "document_start",
      "js": [
        "src/insert/custom-elements.min.js",
        "src/insert/tld.min.js",
        "src/insert/script.js"
      ]
    },
    {
      "matches": [
        "https://extensionpay.com/*"
      ],
      "js": [
        "src/background/ExtPay.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "watermark/*"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "genuinereadermode@gmail.com",
      "strict_min_version": "109.0"
    }
  },
  "omnibox": {
    "keyword": "grm"
  }
}