Examine source code of Marklog

{
  "name" : "Marklog.app",
  "version" : "1.0.1",
  "manifest_version" : 2 ,
  "description" : "Marklog app extension allows you to upload new bookmarks easily to your account",
  "homepage_url" : "https://marklog.app/",
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "js" : [
        "lib/browser-polyfill.min.js" 
      ]
    }
  ],
  "permissions" : [
    "tabs" ,
    "scripting" ,
    "http://*/*" ,
    "https://*/*" 
  ],
  "content_security_policy" : "script-src 'self'; object-src 'self'",
  "browser_action" : {
    "default_icon" : "icon.png",
    "default_popup" : "popup.html"
  },
  "icons" : {
    "16" : "icon16.png",
    "48" : "icon48.png",
    "128" : "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0623af82-e619-4f34-987b-53ccc34f66d5}"
    }
  }
}