Examine source code of I Hate Security Headers!

{
  "manifest_version": 2,
  "name": "I Hate Security Headers!",
  "version": "1.0",
  "description": "Checks security headers like CSP, HSTS, etc. Useful for auditing production responses.",
  "permissions": [
    "activeTab",
    "scripting",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "I Hate Security Headers!",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "applications": {
    "gecko": {
      "id": "security-headers-checker@your-domain.com",
      "strict_min_version": "102.0"
    }
  }
}