Examine source code of Web Safety

{
  "manifest_version" : 2 ,
  "name" : "Web Safety",
  "version" : "1.0",
  "description" : "This extension evaluates website security, displaying a percentage and color-coded indicator. It checks for HTTPS, frameworks, CMS, cookies, and security headers.",
  "permissions" : [
    "activeTab" ,
    "webRequest" ,
    "<all_urls>" ,
    "cookies" ,
    "tabs" 
  ],
  "browser_action" : {
    "default_popup" : "popup.html",
    "default_icon" : {
      "16" : "icons/icon16.png",
      "48" : "icons/icon48.png",
      "128" : "icons/icon128.png"
    }
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "icons" : {
    "16" : "icons/icon16.png",
    "48" : "icons/icon48.png",
    "128" : "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{89f95a3a-1ce6-461d-adc4-11bfd43b1350}"
    }
  }
}