Can I use
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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/">

Chrome

  1. ❌ 4 - 45: Not supported
  2. ✅ 46 - 136: Supported
  3. ✅ 137: Supported
  4. ✅ 138 - 140: Supported

Edge

  1. ❌ 12 - 14: Not supported
  2. ◐ 15 - 18: Partial support
  3. ✅ 79 - 136: Supported
  4. ✅ 137: Supported

Safari

  1. ❌ 3.1 - 11: Not supported
  2. ✅ 11.1 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0 - TP: Supported

Firefox

  1. ❌ 2 - 38: Not supported
  2. ✅ 39: Supported
  3. ✅ 40 - 70: Supported
  4. ❌ 71 - 114: Not supported
  5. ✅ 115 - 138: Supported
  6. ✅ 139: Supported
  7. ✅ 140 - 142: Supported

Opera

  1. ❌ 9 - 32: Not supported
  2. ✅ 33 - 116: Supported
  3. ✅ 117: Supported

IE

  1. ❌ 5.5 - 10: Not supported
  2. ❌ 11: Not supported

Chrome for Android

  1. ✅ 137: Supported

Safari on iOS

  1. ❌ 3.2 - 11.2: Not supported
  2. ✅ 11.3 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0: Supported

Samsung Internet

  1. ❌ 4: Not supported
  2. ✅ 5 - 27: Supported
  3. ✅ 28: Supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10 - 12.1: Not supported
  2. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ✅ 137: Supported

Firefox for Android

  1. ✅ 139: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
Eliminating Roundtrips with Preconnect