Examine source code of editing variables

{
  "manifest_version" : 3 ,
  "name" : "Temporary Text Editor",
  "version" : "1.0.0",
  "description" : "Временно изменяет выделенный текст на странице.",
  "browser_specific_settings": {
    "gecko": {
      "id": "temporary-text-editor@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions" : [
    "menus" ,
    "activeTab" 
  ],
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "js" : [
        "content.js" 
      ],
      "css" : [
        "style.css" 
      ]
    }
  ],
  "icons" : {
    "48" : "icon.png",
    "96" : "icon.png"
  },
  "action" : {
    "default_title" : "Temporary Text Editor",
    "default_icon" : {
      "48" : "icon.png",
      "96" : "icon.png"
    }
  }
}