| Security & Bot Defense | |
| HSTS HTTP header forcing browsers to use secure HTTPS connections | 122.9M sites |
| Web Servers & Operating Systems | |
| HTTP/3 Modern web transport protocol over QUIC for faster connections | 147.9M sites |
| Nginx High-performance web server and reverse proxy widely deployed | 141.9M sites |
| Varnish HTTP reverse proxy and caching accelerator for web content | 5.8M sites |
| SEO & Content Discovery | |
| RSS Web feed format syndicating site content for readers and aggregators | 54.2M sites |
| other | |
| Ol-Asn | 60 sites |
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