Examine source code of Chatwapp in Sidebar

{
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "ChatwappInSidebar@Godie"
    }
  },
  "name": "Chatwapp in Sidebar",
  "description": "Displays a sidebar that lets you talk to your friends. Define and use a shortcut to fast access.",
  "version": "2.4",
  "icons": {
    "512": "icons/logo_chatwappfill.svg"
  },
  "optional_host_permissions": [
    "*://web.whatsapp.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://web.whatsapp.com/*"
      ],
      "css": [
        "whatsapp/whatsapp.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": false
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Alt+W"
      },
      "description": "Toggle Chatwapp in the sidebar."
    }
  },
  "sidebar_action": {
    "default_icon": {
      "512": "icons/logo_chatwappfill.svg"
    },
    "default_title": "Chatwapp",
    "default_panel": "whatsapp/whatsapp.html"
  },
  "action": {
    "default_icon": {
      "512": "icons/logo_chatwappfill.svg"
    }
  }
}