Examine source code of Page2Sheet

{
  "manifest_version" : 3 ,
  "name" : "__MSG_extName__" ,
  "description" : "__MSG_extDescription__" ,
  "version" : "0.1.0",
  "short_name" : "Page2Sheet",
  "icons" : {
    "16" : "icon/16.png",
    "32" : "icon/32.png",
    "48" : "icon/48.png",
    "128" : "icon/128.png"
  },
  "default_locale" : "en" ,
  "permissions" : [
    "activeTab" ,
    "scripting" ,
    "storage" ,
    "downloads" 
  ],
  "sidebar_action": {
    "default_panel": "panel.html",
    "default_title" : "__MSG_extName__" ,
    "default_icon" : {
      "16" : "icon/16.png",
      "32" : "icon/32.png",
      "48" : "icon/48.png",
      "128" : "icon/128.png"
    },
    "open_at_install": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "page2sheet@page2sheet.app",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "action" : {
    "default_title" : "__MSG_actionTitle__" ,
    "default_icon" : {
      "16" : "icon/16.png",
      "32" : "icon/32.png",
      "48" : "icon/48.png",
      "128" : "icon/128.png"
    }
  },
  "commands" : {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+E"
      },
      "description" : "__MSG_commandOpen__" 
    }
  },
  "background" : {
    "type" : "module" ,
    "scripts" : [
      "background.js" 
    ]
  }
}