Examine source code of Difframe

{
  "manifest_version" : 3 ,
  "name" : "Difframe",
  "version" : "1.0.1",
  "description" : "__MSG_extDescription__" ,
  "default_locale" : "en" ,
  "permissions" : [
    "declarativeNetRequest" ,
    "storage" ,
    "unlimitedStorage" ,
    "scripting" ,
    "activeTab" 
  ],
  "host_permissions" : [
    "<all_urls>" 
  ],
  "icons" : {
    "16" : "icons/icon-16.png",
    "32" : "icons/icon-32.png",
    "48" : "icons/icon-48.png",
    "128" : "icons/icon-128.png"
  },
  "background" : {
    "service_worker" : "background.js" ,
    "scripts" : [
      "background.js" 
    ]
  },
  "action" : {
    "default_title" : "Difframe",
    "default_popup" : "popup.html",
    "default_icon" : {
      "16" : "icons/icon-16.png",
      "32" : "icons/icon-32.png",
      "48" : "icons/icon-48.png",
      "128" : "icons/icon-128.png"
    },
    "theme_icons": [
      {
        "light": "icons/icon-light-16.png",
        "dark": "icons/icon-16.png",
        "size": 16
      },
      {
        "light": "icons/icon-light-32.png",
        "dark": "icons/icon-32.png",
        "size": 32
      },
      {
        "light": "icons/icon-light-48.png",
        "dark": "icons/icon-48.png",
        "size": 48
      },
      {
        "light": "icons/icon-light-128.png",
        "dark": "icons/icon-128.png",
        "size": 128
      }
    ]
  },
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "js" : [
        "content.js" 
      ],
      "css" : [
        "content.css" 
      ],
      "all_frames" : true ,
      "run_at" : "document_idle" 
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@difframe",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}