Critical CSS Extractor

extract Critical CSS rules for the current page

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "content_security_policy": "script-src 'self' https://www.google-analytics.com; object-src 'self';",
  "description": "extract Critical CSS rules for the current page",
  "devtools_page": "devtools.html",
  "manifest_version": 2,
  "name": "Critical CSS Extractor",
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "version": "2.7.4"
}