Examine source code of ExpandTXT

{
  "manifest_version": 3,
  "name": "__MSG_ExpandTXT__",
  "description": "__MSG_Modern_auto_text_expander__",
  "default_locale": "en",
  "version": "1.0.3",
  "browser_specific_settings": {
    "gecko": {
      "id": "expandtxt@txtlabs",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true,
      "exclude_matches": [
        "http://*.americanexpress.com/*",
        "https://*.americanexpress.com/*",
        "http://*.bankofamerica.com/*",
        "https://*.bankofamerica.com/*",
        "http://*.barclays.com/*",
        "https://*.barclays.com/*",
        "http://*.capitalone.com/*",
        "https://*.capitalone.com/*",
        "http://*.chase.com/*",
        "https://*.chase.com/*",
        "http://*.citibank.com/*",
        "https://*.citibank.com/*",
        "http://*.coinbase.com/*",
        "https://*.coinbase.com/*",
        "http://*.discover.com/*",
        "https://*.discover.com/*",
        "http://*.fidelity.com/*",
        "https://*.fidelity.com/*",
        "http://*.hsbc.com/*",
        "https://*.hsbc.com/*",
        "http://*.irs.gov/*",
        "https://*.irs.gov/*",
        "http://*.kraken.com/*",
        "https://*.kraken.com/*",
        "http://*.robinhood.com/*",
        "https://*.robinhood.com/*",
        "http://*.schwab.com/*",
        "https://*.schwab.com/*",
        "http://*.squareup.com/*",
        "https://*.squareup.com/*",
        "http://*.stripe.com/*",
        "https://*.stripe.com/*",
        "http://*.tdbank.com/*",
        "https://*.tdbank.com/*",
        "http://*.usaa.com/*",
        "https://*.usaa.com/*",
        "http://*.vanguard.com/*",
        "https://*.vanguard.com/*",
        "http://*.wellsfargo.com/*",
        "https://*.wellsfargo.com/*",
        "http://*.paypal.com/*",
        "https://*.paypal.com/*",
        "http://*.hdfcbank.com/*",
        "https://*.hdfcbank.com/*",
        "http://*.icicibank.com/*",
        "https://*.icicibank.com/*",
        "http://*.axisbank.com/*",
        "https://*.axisbank.com/*",
        "http://*.sbi.co.in/*",
        "https://*.sbi.co.in/*",
        "http://*.onlinesbi.sbi/*",
        "https://*.onlinesbi.sbi/*",
        "http://*.kotak.com/*",
        "https://*.kotak.com/*",
        "http://*.yesbank.in/*",
        "https://*.yesbank.in/*",
        "http://*.indusind.com/*",
        "https://*.indusind.com/*",
        "http://*.zerodha.com/*",
        "https://*.zerodha.com/*",
        "http://*.kite.zerodha.com/*",
        "https://*.kite.zerodha.com/*",
        "http://*.groww.in/*",
        "https://*.groww.in/*",
        "http://*.binance.com/*",
        "https://*.binance.com/*",
        "http://*.crypto.com/*",
        "https://*.crypto.com/*",
        "http://*.etrade.com/*",
        "https://*.etrade.com/*",
        "http://*.tdameritrade.com/*",
        "https://*.tdameritrade.com/*",
        "http://*.interactivebrokers.com/*",
        "https://*.interactivebrokers.com/*"
      ]
    }
  ],
  "action": {
    "default_popup": "popup/popup.html"
  },
  "options_page": "options/options.html",
  "icons": {
    "16": "assets/icons/icon16.png",
    "32": "assets/icons/icon32.png",
    "48": "assets/icons/icon48.png",
    "128": "assets/icons/icon128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}