Examine source code of iorad - the tutorial builder

{
  "manifest_version" : 2 ,
  "applications": {
    "gecko": {
      "id": "{35ab4090-7438-4a2f-94c6-f43aff24b770}",
      "strict_min_version": "50.0"
    }
  },
  "name" : "iorad — the fast tutorial builder",
  "version" : "1.8.0.4757",
  "description" : "Tutorial creation made easy. Instantly make guided, step-by-step directions for any website. Directly in the browser.",
  "icons" : {
    "48" : "assets/icon.png",
    "128" : "assets/icon.png"
  },
  "author": "iorad",
  "short_name" : "iorad helper",
  "background" : {
    "page": "background.html",
    "persistent" : true 
  },
  "browser_action" : {
    "default_icon" : {
      "19" : "assets/icon.png",
      "38" : "assets/icon.png"
    }
  },
  "permissions" : [
    "identity" ,
    "storage" ,
    "tabs" ,
    "nativeMessaging" ,
    "webNavigation" ,
    "webRequest" ,
    "webRequestBlocking" ,
    "unlimitedStorage" ,
    "cookies" ,
    "contextMenus" ,
    "<all_urls>" 
  ],
  "web_accessible_resources" : [
    "assets/*.*",
    "panel/*.*",
    "content/*.*"
  ],
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "match_about_blank" : true ,
      "js" : [
        "runtime.js" ,
        "content_subFrameCommon.js" ,
        "content_subFrameInitial.js" ,
        "content_playerFrameNode.js" ,
        "content_captureFrameNode.js" ,
        "content_editorFrameNode.js" ,
        "content_integrationsFrameNode.js" 
      ],
      "run_at" : "document_start" ,
      "all_frames" : true 
    },
    {
      "matches" : [
        "<all_urls>" 
      ],
      "match_about_blank" : true ,
      "js" : [
        "content_topFrame.js" 
      ],
      "css" : [
        "content_topFrame.css" 
      ],
      "run_at" : "document_start" ,
      "all_frames" : false 
    },
    {
      "matches" : [
        "<all_urls>" 
      ],
      "match_about_blank" : true ,
      "css" : [
        "content_subFrameCommon.css" 
      ],
      "run_at" : "document_start" ,
      "all_frames" : true 
    }
  ]
}