Examine source code of Request Interceptor

{
  "manifest_version" : 2 ,
  "name" : "Request Interceptor",
  "version" : "4.0",
  "description" : "A Firefox extension to intercept HTTP requests, manually edit and send them to the server.",
  "permissions" : [
    "webRequest" ,
    "webRequestBlocking" ,
    "<all_urls>" ,
    "storage" ,
    "tabs" ,
    "proxy" ,
    "privacy" 
  ],
  "incognito" : "spanning" ,
  "background" : {
    "scripts" : [
      "background.js" 
    ],
    "type" : "module" 
  },
  "browser_action" : {
    "default_icon" : "icon-off.png"
  },
  "content_security_policy" : "script-src 'self' https://cdn.jsdelivr.net; object-src 'self'",
  "icons" : {
    "48" : "icon-off.png",
    "128" : "icon-on.png"
  },
  "web_accessible_resources" : [
    "extension-page.html",
    "highlight.min.js",
    "default.min.css",
    "styles.css",
    "lookup-styles.css",
    "json.min.js",
    "xml.min.js",
    "analytics-styles.css",
    "repeater-styles.css",
    "encoding-styles.css",
    "proxy-styles.css",
    "proxy-manager.js",
    "url-analyzer-styles.css",
    "intruder-styles.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "91.1.0",
      "id": "{9efa0613-820d-4f74-8876-11ac0c17244e}"
    }
  }
}