Examine source code of Developer Page Inspector

{
  "manifest_version" : 3 ,
  "name" : "__MSG_appName__" ,
  "description" : "__MSG_appDesc__" ,
  "version" : "0.1.0",
  "default_locale" : "en" ,
  "icons" : {
    "16" : "icons/16.png",
    "32" : "icons/32.png",
    "48" : "icons/48.png",
    "128" : "icons/128.png"
  },
  "action" : {
    "default_popup" : "popup.html",
    "default_title" : "__MSG_appName__" 
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ],
    "type" : "module" 
  },
  "permissions" : [
    "storage" ,
    "activeTab" ,
    "scripting" ,
    "contextMenus" ,
    "alarms" 
  ],
  "optional_permissions" : [
    "cookies" ,
    "downloads" ,
    "browsingData" ,
    "userScripts" ,
    "webRequest" 
  ],
  "host_permissions" : [
    "https://api.lemonsqueezy.com/*" 
  ],
  "optional_host_permissions" : [
    "<all_urls>" 
  ],
  "content_security_policy" : {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "commands" : {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+I"
      },
      "description" : "__MSG_cmdOpen__" 
    },
    "inspect": {
      "suggested_key": {
        "default": "Alt+Shift+E"
      },
      "description" : "__MSG_menuInspect__" 
    },
    "audit": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description" : "__MSG_menuAudit__" 
    }
  },
  "sidebar_action": {
    "default_panel": "workbench.html",
    "default_title" : "__MSG_appName__" ,
    "default_icon" : {
      "16" : "icons/16.png",
      "32" : "icons/32.png",
      "48" : "icons/48.png",
      "128" : "icons/128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "developer-page-inspector@hgstudio",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}