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}"
    }
  }
}