Examine source code of NoLet Sender

{
  "manifest_version": 3,
  "name": "NoLet Sender",
  "description": "__MSG_ext_desc__",
  "version": "1.2.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "default_locale": "en",
  "omnibox": {
    "keyword": "bb"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "activeTab",
    "notifications",
    "clipboardRead"
  ],
  "host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "commands": {
    "send-clipboard": {
      "suggested_key": {
        "default": "Ctrl+Shift+8",
        "mac": "Command+Shift+8"
      },
      "description": "__MSG_shortcut_send_clipboard_description__"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "NoLet Sender",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content-scripts/element-analyzer.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "to@wzs.app",
      "strict_min_version": "109.0"
    }
  }
}