Top Extensions (past week)

Rank Extension Fingerprints Connections
1 supported_groups (0x000a) 4298 99.9%
2 signature_algorithms (0x000d) 4120 99.2%
3 ec_point_formats (0x000b) 4181 97.7%
4 server_name (0x0000) 4180 97.2%
5 extended_master_secret (0x0017) 3049 89.3%
6 application_layer_protocol_negotiation (0x0010) 2038 71.3%
7 renegotiation_info (0xff01) 1925 61.9%
8 status_request (0x0005) 1994 61.5%
9 supported_versions (0x002b) 2065 58.1%
10 key_share (0x0033) 1977 57.3%
11 psk_key_exchange_modes (0x002d) 1874 53.4%
12 SessionTicket TLS (0x0023) 2754 51.4%
13 padding (0x0015) 1359 45.0%
14 encrypt_then_mac (0x0016) 960 26.6%
15 signed_certificate_timestamp (0x0012) 721 24.4%
16 post_handshake_auth (0x0031) 274 21.1%
17 GREASE (0x0a0a) 301 18.5%
18 NPN (0x3374) 531 17.8%
19 compressed_certificate (0x001b) 209 14.7%
20 heartbeat (0x000f) 858 4.6%
21 pre_shared_key (0x0029) 370 4.4%
22 record_size_limit (0x001c) 254 3.0%
23 signature_algorithms_cert (0x0032) 180 2.8%
24 Unknown (0x0022) 99 2.2%
25 status_request_v2 (0x0011) 131 1.5%
26 application_settings (0x4469) 35 1.1%
27 ChannelID (0x7550) 68 1.1%
28 early_data (0x002a) 41 0.9%
29 Unknown (0xff04) 2 0.1%
30 max_fragment_length (0x0001) 27 0.0%
31 token_binding (0x0018) 21 0.0%
32 server_certificate_type (0x0014) 2 0.0%
33 Unknown (0xfe0d) 14 0.0%
34 LEGACY_ChannelID (0x754f) 9 0.0%
35 extended_random (0x0028) 14 0.0%
36 Unknown (0xff03) 5 0.0%
37 Unknown (0xef00) 1 0.0%
38 LEGACY_token_binding (0x5500) 5 0.0%
39 LEGACY_padding (0x8b47) 1 0.0%
40 client_certificate_url (0x0002) 2 0.0%
41 truncated_hmac (0x0004) 2 0.0%