Resource Hints: preconnect
- WDGives 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
- ❌ 4 - 45: Not supported
- ✅ 46 - 130: Supported
- ✅ 131: Supported
- ✅ 132 - 134: Supported
Edge
- ❌ 12 - 14: Not supported
- ◐ 15 - 18: Partial support
- ✅ 79 - 130: Supported
- ✅ 131: Supported
Safari
- ❌ 3.1 - 11: Not supported
- ✅ 11.1 - 18.0: Supported
- ✅ 18.1: Supported
- ✅ 18.2 - TP: Supported
Firefox
- ❌ 2 - 38: Not supported
- ✅ 39: Supported
- ✅ 40 - 70: Supported
- ❌ 71 - 114: Not supported
- ✅ 115 - 132: Supported
- ✅ 133: Supported
- ✅ 134 - 136: Supported
Opera
- ❌ 9 - 32: Not supported
- ✅ 33 - 113: Supported
- ✅ 114: Supported
IE
- ❌ 5.5 - 10: Not supported
- ❌ 11: Not supported
Chrome for Android
- ✅ 131: Supported
Safari on iOS
- ❌ 3.2 - 11.2: Not supported
- ✅ 11.3 - 18.0: Supported
- ✅ 18.1: Supported
- ✅ 18.2: Supported
Samsung Internet
- ❌ 4: Not supported
- ✅ 5 - 25: Supported
- ✅ 26: Supported
Opera Mini
- ❌ all: Not supported
Opera Mobile
- ❌ 10 - 12.1: Not supported
- ✅ 80: Supported
UC Browser for Android
- ✅ 15.5: Supported
Android Browser
- ❌ 2.1 - 4.4.4: Not supported
- ✅ 131: Supported
Firefox for Android
- ✅ 132: Supported
QQ Browser
- ✅ 14.9: Supported
Baidu Browser
- ✅ 13.52: Supported
KaiOS Browser
- ✅ 2.5: Supported
- ✅ 3: Supported
- Resources:
- Eliminating Roundtrips with Preconnect