HTTP/3 protocol

Third version of the HTTP networking protocol which uses QUIC as transport protocol. Previously known as HTTP-over-QUIC, now standardized as HTTP/3.

Other: https://datatracker.ietf.org/doc/rfc9114/

Usage: 78% + 17.4% = 95.5%

Support summary

IE: Not supported
Edge: 87, available but disabled by default since 79, notes for version 79₂, notes for version 85₃
Firefox: 88, available but disabled by default since 72, notes for version 72₁
Chrome: 87, available but disabled by default since 79, notes for version 79₂, notes for version 85₃
Safari: partial since 14, available but disabled by default since 14, notes for version 14₄, notes for version 16.0₅, notes for version 16.4₅
Opera: 74, available but disabled by default since 73, notes for version 73₃
Safari on iOS: partial since 14.0-14.4, available but disabled by default since 14.0-14.4, notes for version 14.0-14.4₅, notes for version 16.4₅
Opera Mini: Not supported
Android Browser: 124
Blackberry Browser: Not supported
Opera Mobile: 80
Chrome for Android: 124
Firefox for Android: 125
IE Mobile: Not supported
UC Browser for Android: 15.5
Samsung Internet: 14.0
QQ Browser: Not supported
Baidu Browser: 13.52
KaiOS Browser: Not supported

Notes

Can be enabled in Firefox via the `network.http.http3.enabled` pref in `about:config`. ↑
Can be enabled in Chrome(Chromium) via the `--enable-quic` & `--quic-version=h3-23` command line arguments. ↑
Can be enabled in Chrome(Chromium) via the `--enable-quic` & `--quic-version=h3-29` command line arguments. ↑
Requires macOS 11 Big Sur or later. ↑
Enabled by default for a portion of users. ↑

Full support table

IE

5.5	6	7	8	9	10	11
n	n	n	n	n	n	n

Edge

12	13	14	15	16	17	18	79	80	81	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	100	101	102	103	104	105	106	107	108	109	110	111	112	113	114	115	116	117	118	119	120	121	122	123	124
n	n	n	n	n	n	n	n,d	n,d	n,d	n,d	n,d	n,d	n,d	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y

Firefox

2	3	3.5	3.6	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	100	101	102	103	104	105	106	107	108	109	110	111	112	113	114	115	116	117	118	119	120	121	122	123	124	125	126	127	128
n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	n,d	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y

Chrome

4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	100	101	102	103	104	105	106	107	108	109	110	111	112	113	114	115	116	117	118	119	120	121	122	123	124	125	126	127
n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n,d	n,d	n,d	n,d	n,d	n,d	n,d	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y

Safari

3.1	3.2	4	5	5.1	6	6.1	7	7.1	8	9	9.1	10	10.1	11	11.1	12	12.1	13	13.1	14	14.1	15	15.1	15.2-15.3	15.4	15.5	15.6	16.0	16.1	16.2	16.3	16.4	16.5	16.6	17.0	17.1	17.2	17.3	17.4	17.5	TP
n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a	a	a	a	a	a	a	a	a	a

Opera

9	9.5-9.6	10.0-10.1	10.5	10.6	11	11.1	11.5	11.6	12	12.1	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	60	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	100	101	102	103	104	105	106	107	108	109
n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n,d	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y	y

Safari on iOS

3.2	4.0-4.1	4.2-4.3	5.0-5.1	6.0-6.1	7.0-7.1	8	8.1-8.4	9.0-9.2	9.3	10.0-10.2	10.3	11.0-11.2	11.3-11.4	12.0-12.1	12.2-12.5	13.0-13.1	13.2	13.3	13.4-13.7	14.0-14.4	14.5-14.8	15.0-15.1	15.2-15.3	15.4	15.5	15.6-15.8	16.0	16.1	16.2	16.3	16.4	16.5	16.6-16.7	17.0	17.1	17.2	17.3	17.4	17.5
n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	n	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a,d	a	a	a	a	a	a	a	a	a

Opera Mini

all
n

Android Browser

2.1	2.2	2.3	3	4	4.1	4.2-4.3	4.4	4.4.3-4.4.4	124
n	n	n	n	n	n	n	n	n	y

Blackberry Browser

7	10
n	n

Opera Mobile

10	11	11.1	11.5	12	12.1	80
n	n	n	n	n	n	y

Chrome for Android

124
y

Firefox for Android

125
y

IE Mobile

10	11
n	n

UC Browser for Android

15.5
y

Samsung Internet

4	5.0-5.4	6.2-6.4	7.2-7.4	8.2	9.2	10.1	11.1-11.2	12.0	13.0	14.0	15.0	16.0	17.0	18.0	19.0	20	21	22	23	24
n	n	n	n	n	n	n	n	n	n	y	y	y	y	y	y	y	y	y	y	y

QQ Browser

14.9
n

Baidu Browser

13.52
y

KaiOS Browser

2.5	3.0-3.1
n	n

y = supported
a = partially supported, see notes
x = supported with a prefix, e.g. moz, webkit
p = supported with a polyfill
d = available but disabled by default; the feature need to be enabled in about:config, chrome://flags, etc.
n = not supported
u = unknown/untested

Back to list

HTTP/3 protocol

Support summary

Notes

Links

Full support table

IE

Edge

Firefox

Chrome

Safari

Opera

Safari on iOS

Opera Mini

Android Browser

Blackberry Browser

Opera Mobile

Chrome for Android

Firefox for Android

IE Mobile

UC Browser for Android

Samsung Internet

QQ Browser

Baidu Browser

KaiOS Browser