Examine source code of Crossmark - XRP Wallet

{
  "manifest_version": 3,
  "name": "Crossmark - XRP Wallet",
  "icons": {
    "16": "assets/icons/favicon-16.png",
    "32": "assets/icons/favicon-32.png",
    "48": "assets/icons/favicon-48.png",
    "128": "assets/icons/favicon-128.png"
  },
  "description": "A non-custodial wallet in your browser. Send, receive, create value with ease. | Learn more at https://crossmark.io",
  "homepage_url": "https://crossmark.io",
  "short_name": "Crossmark",
  "permissions": [
    "activeTab",
    "storage",
    "unlimitedStorage",
    "tabs",
    "clipboardWrite"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "author": "interc0der",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e280c76-5ac2-400d-8b36-88de2e6f314c}"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "assets/icons/favicon-16.png",
      "32": "assets/icons/favicon-32.png",
      "48": "assets/icons/favicon-48.png",
      "128": "assets/icons/favicon-128.png"
    },
    "default_title": "crossmark"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "static/js/background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "static/js/content.bundle.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "static/js/inject.bundle.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "version": "0.2.15"
}