Resource Hints: preconnect

- WD

Gives a hint to the browser to begin the connection handshake (DNS, TCP, TLS) in the background to improve performance. This is indicated using <link rel="preconnect" href="https://example-domain.com/">

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12 - 14
  2. 15 - 18
  3. 79 - 81
  4. 83

Firefox

  1. 2 - 38
  2. 39
  3. 40 - 75
  4. 76
  5. 77 - 78

Chrome

  1. 4 - 45
  2. 46 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 11
  2. 11.1 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 32
  2. 33 - 67
  3. 68

iOS Safari

  1. 3.2 - 11.2
  2. 11.3 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4
  2. 5 - 10.1
  3. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5
Resources:
Eliminating Roundtrips with Preconnect