Examine source code of Local Page Editor

{
  "manifest_version" : 3 ,
  "name" : "Local Page Editor",
  "version" : "1.0.3",
  "description" : "Locally edit webpage text, input values, or safe HTML and persist those changes in your own Firefox browser.",
  "author": "LAF",
  "icons" : {
    "16" : "icons/icon-16.png",
    "32" : "icons/icon-32.png",
    "48" : "icons/icon-48.png",
    "96" : "icons/icon-96.png",
    "128" : "icons/icon-128.png"
  },
  "permissions" : [
    "storage" ,
    "activeTab" 
  ],
  "host_permissions" : [
    "http://*/*" ,
    "https://*/*" 
  ],
  "action" : {
    "default_title" : "Local Page Editor",
    "default_popup" : "popup/popup.html",
    "default_icon" : {
      "16" : "icons/icon-16.png",
      "32" : "icons/icon-32.png",
      "48" : "icons/icon-48.png"
    }
  },
  "options_ui" : {
    "page": "options/options.html" ,
    "open_in_tab": true
  },
  "content_scripts" : [
    {
      "matches" : [
        "http://*/*" ,
        "https://*/*" 
      ],
      "js" : [
        "shared/storage.js" ,
        "shared/html-sanitizer.js" ,
        "content/content.js" 
      ],
      "css" : [
        "content/content.css" 
      ],
      "run_at" : "document_idle" 
    }
  ],
  "content_security_policy" : {
    "extension_pages": "script-src 'self'; object-src 'none'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "local-page-editor@laf.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}