WPT

This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.

wpt / css

Runs: Chrome 155.0.8039.0 (wpt@3f6b09ae3, 2026-09-03) | Firefox 157.0a1 (wpt@3f6b09ae3, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-795e1 (wpt@7e3d005d7, 2026-09-03) | Servo Servo 0.6 (wpt@09159dcb3, 2026-09-02) | Blitz 188486089 (wpt@a95401e4e, 2026-09-02)

Sort areas: alphabetical | by subtest count

Area	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	94.7%207103/218599	85.2%186181/218599	87.2%190583/218599	72.3%158062/218599	50.3%109893/218599	42.2%92256/218599
CSS2	98.6%8679/8805	98.2%8646/8805	96.1%8464/8805	90.7%7985/8805	92.6%8154/8805	70.2%6177/8805
WOFF2	98.0%292/298	98.0%292/298	98.3%293/298	98.3%293/298	98.0%292/298	98.3%293/298
compositing	92.3%215/233	92.7%216/233	90.1%210/233	92.7%216/233	87.6%204/233	67.0%156/233
css-align	99.1%5233/5282	93.9%4959/5282	96.9%5119/5282	53.9%2845/5282	80.5%4253/5282	71.2%3760/5282
css-anchor-position	99.6%13861/13912	99.0%13767/13912	99.3%13819/13912	81.3%11310/13912	13.9%1937/13912	24.9%3471/13912
css-animations	95.8%1424/1487	94.6%1406/1487	97.5%1450/1487	72.6%1079/1487	51.3%763/1487	48.6%723/1487
css-backgrounds	95.4%6605/6923	95.1%6584/6923	95.1%6583/6923	92.1%6376/6923	73.3%5073/6923	65.0%4503/6923
css-borders	85.5%1500/1755	22.6%396/1755	68.7%1206/1755	62.3%1093/1755	21.6%379/1755	55.2%969/1755
css-box	85.8%1025/1194	79.1%944/1194	84.0%1003/1194	79.1%944/1194	58.0%693/1194	44.6%533/1194
css-break	98.3%1865/1898	52.1%989/1898	66.0%1252/1898	32.7%620/1898	16.2%307/1898	16.2%308/1898
css-cascade	88.2%1720/1950	82.4%1607/1950	84.3%1643/1950	74.9%1460/1950	55.1%1075/1950	8.6%167/1950
css-color	89.0%11507/12934	90.5%11705/12934	87.6%11329/12934	87.5%11317/12934	87.5%11311/12934	81.9%10590/12934
css-color-adjust	97.9%187/191	97.9%187/191	74.9%143/191	60.7%116/191	57.6%110/191	70.2%134/191
css-color-hdr	99.1%115/116	14.7%17/116	26.7%31/116	14.7%17/116	14.7%17/116	14.7%17/116
css-conditional	96.9%3333/3440	89.7%3084/3440	89.4%3076/3440	88.2%3035/3440	64.3%2212/3440	50.5%1736/3440
css-contain	98.5%970/985	92.7%913/985	96.2%948/985	68.6%676/985	38.8%382/985	45.4%447/985
css-content	97.5%314/322	95.3%307/322	84.2%271/322	87.3%281/322	66.5%214/322	50.9%164/322
css-counter-styles	95.0%378/398	94.7%377/398	89.4%356/398	88.9%354/398	18.1%72/398	2.0%8/398
css-device-adapt	71.4%5/7	71.4%5/7	71.4%5/7	71.4%5/7	28.6%2/7	28.6%2/7
css-display	82.6%636/770	71.0%547/770	66.6%513/770	77.9%600/770	56.6%436/770	45.1%347/770
css-easing	88.0%139/158	87.3%138/158	98.7%156/158	83.5%132/158	72.8%115/158	73.4%116/158
css-env	100.0%53/53	90.6%48/53	90.6%48/53	75.5%40/53	90.6%48/53	71.7%38/53
css-exclusions	0.0%0/15	0.0%0/15	0.0%0/15	0.0%0/15	0.0%0/15	0.0%0/15
css-flexbox	99.0%5703/5760	96.6%5564/5760	95.8%5518/5760	85.5%4926/5760	70.8%4079/5760	68.8%3965/5760
css-font-loading	80.7%201/249	72.3%180/249	68.7%171/249	72.7%181/249	50.6%126/249	2.4%6/249
css-fonts	97.0%8593/8860	96.3%8533/8860	96.1%8513/8860	73.0%6471/8860	68.0%6025/8860	46.7%4142/8860
css-forced-color-adjust	100.0%14/14	85.7%12/14	42.9%6/14	42.9%6/14	42.9%6/14	85.7%12/14
css-forms	97.5%79/81	42.0%34/81	66.7%54/81	40.7%33/81	40.7%33/81	2.5%2/81
css-gaps	99.6%4580/4599	9.0%413/4599	8.8%406/4599	7.7%353/4599	7.8%357/4599	7.9%363/4599
css-grid	99.3%16337/16460	85.7%14103/16460	92.3%15198/16460	69.9%11512/16460	50.5%8307/16460	49.0%8058/16460
css-highlight-api	99.6%265/266	97.7%260/266	98.1%261/266	14.7%39/266	14.7%39/266	6.0%16/266
css-image-animation	14.8%4/27	11.1%3/27	18.5%5/27	22.2%6/27	22.2%6/27	55.6%15/27
css-images	99.0%4012/4053	96.3%3904/4053	96.5%3910/4053	88.5%3587/4053	89.2%3617/4053	85.0%3446/4053
css-inline	80.3%967/1204	90.5%1090/1204	62.0%747/1204	29.5%355/1204	35.3%425/1204	23.2%279/1204
css-layout-api	98.7%157/159	15.1%24/159	15.1%24/159	9.4%15/159	14.5%23/159	14.5%23/159
css-link-params	46.2%12/26	100.0%26/26	46.2%12/26	46.2%12/26	46.2%12/26	46.2%12/26
css-lists	91.3%1056/1157	94.5%1093/1157	63.4%734/1157	92.4%1069/1157	43.2%500/1157	59.5%688/1157
css-logical	94.3%1371/1454	94.0%1367/1454	99.9%1453/1454	92.4%1344/1454	65.7%956/1454	59.0%858/1454
css-masking	73.1%5042/6895	72.1%4971/6895	96.4%6645/6895	51.4%3547/6895	30.9%2130/6895	42.3%2919/6895
css-mixins	97.9%592/605	18.3%111/605	71.2%431/605	74.5%451/605	18.3%111/605	9.6%58/605
css-motion-path	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1
css-multicol	99.5%2231/2243	80.5%1806/2243	75.9%1703/2243	57.2%1283/2243	40.2%902/2243	38.6%865/2243
css-namespaces	100.0%23/23	100.0%23/23	100.0%23/23	100.0%23/23	100.0%23/23	95.7%22/23
css-navigation	98.9%88/89	41.6%37/89	41.6%37/89	41.6%37/89	41.6%37/89	0.0%0/89
css-nesting	99.3%139/140	100.0%140/140	99.3%139/140	95.0%133/140	95.0%133/140	31.4%44/140
css-overflow	93.5%1646/1760	60.5%1065/1760	52.1%917/1760	51.8%911/1760	46.0%810/1760	33.2%585/1760
css-overscroll-behavior	91.8%89/97	72.2%70/97	63.9%62/97	22.7%22/97	19.6%19/97	59.8%58/97
css-page	89.0%364/409	60.4%247/409	30.6%125/409	36.2%148/409	11.2%46/409	30.8%126/409
css-paint-api	97.2%140/144	13.9%20/144	13.9%20/144	13.9%20/144	16.7%24/144	52.8%76/144
css-parser-api	7.0%5/71	7.0%5/71	7.0%5/71	7.0%5/71	7.0%5/71	0.0%0/71
css-position	99.8%1755/1759	89.6%1576/1759	88.1%1550/1759	80.2%1411/1759	70.2%1234/1759	53.6%943/1759
css-properties-values-api	96.8%1349/1394	85.7%1195/1394	96.7%1348/1394	75.1%1047/1394	51.6%720/1394	7.4%103/1394
css-pseudo	92.2%1044/1132	74.5%843/1132	67.8%768/1132	54.7%619/1132	45.4%514/1132	13.1%148/1132
css-rhythm	35.8%72/201	33.8%68/201	35.8%72/201	33.8%68/201	33.8%68/201	35.3%71/201
css-ruby	75.7%184/243	75.3%183/243	52.7%128/243	48.6%118/243	44.0%107/243	40.3%98/243
css-scroll-anchoring	94.9%94/99	96.0%95/99	84.8%84/99	22.2%22/99	23.2%23/99	9.1%9/99
css-scroll-snap	99.2%834/841	88.5%744/841	86.3%726/841	85.7%721/841	20.9%176/841	18.7%157/841
css-scrollbars	100.0%115/115	100.0%115/115	96.5%111/115	65.2%75/115	45.2%52/115	58.3%67/115
css-shadow	93.4%456/488	90.6%442/488	88.5%432/488	76.2%372/488	71.5%349/488	2.5%12/488
css-shapes	99.9%7747/7752	84.6%6556/7752	85.1%6599/7752	84.5%6554/7752	7.9%610/7752	9.1%708/7752
css-size-adjust	100.0%215/215	1.9%4/215	1.9%4/215	1.9%4/215	1.9%4/215	1.9%4/215
css-sizing	98.5%6457/6557	80.7%5293/6557	93.8%6149/6557	66.0%4325/6557	68.1%4464/6557	54.6%3582/6557
css-style-attr	100.0%16/16	100.0%16/16	100.0%16/16	87.5%14/16	100.0%16/16	93.8%15/16
css-syntax	98.4%430/437	76.9%336/437	99.3%434/437	92.7%405/437	74.4%325/437	29.5%129/437
css-tables	95.7%1072/1120	89.0%997/1120	84.3%944/1120	69.6%779/1120	83.6%936/1120	47.5%532/1120
css-text	90.8%6518/7177	74.6%5351/7177	68.0%4881/7177	52.8%3786/7177	59.9%4298/7177	47.3%3398/7177
css-text-decor	88.4%1421/1608	96.1%1546/1608	67.2%1081/1608	76.7%1234/1608	44.6%717/1608	64.4%1036/1608
css-transforms	99.7%6317/6337	99.2%6285/6337	97.7%6190/6337	84.6%5364/6337	65.8%4170/6337	53.7%3401/6337
css-transitions	89.8%2988/3327	88.2%2936/3327	97.1%3232/3327	85.4%2840/3327	29.7%988/3327	23.4%780/3327
css-typed-om	93.2%12543/13465	90.1%12128/13465	91.2%12284/13465	81.6%10989/13465	0.4%48/13465	0.1%18/13465
css-ui	85.0%2819/3317	81.3%2696/3317	82.1%2724/3317	78.7%2612/3317	53.7%1782/3317	63.9%2118/3317
css-values	95.6%10121/10582	56.2%5952/10582	66.5%7033/10582	59.6%6308/10582	53.1%5616/10582	34.0%3599/10582
css-variables	90.5%699/772	89.1%688/772	95.9%740/772	88.0%679/772	82.6%638/772	75.1%580/772
css-view-transitions	99.6%1645/1651	85.2%1407/1651	91.9%1517/1651	52.0%859/1651	45.9%757/1651	6.0%99/1651
css-viewport	99.4%885/890	79.4%707/890	93.9%836/890	52.7%469/890	43.9%391/890	24.7%220/890
css-will-change	100.0%221/221	100.0%221/221	98.6%218/221	95.9%212/221	95.5%211/221	87.8%194/221
css-writing-modes	95.5%1483/1553	96.6%1500/1553	91.9%1427/1553	32.0%497/1553	26.1%406/1553	16.3%253/1553
css-zoom	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1
cssom	96.9%3958/4085	97.3%3975/4085	95.9%3919/4085	89.1%3639/4085	84.7%3462/4085	52.0%2123/4085
cssom-view	93.5%2442/2612	86.3%2254/2612	73.6%1922/2612	72.7%1899/2612	55.5%1450/2612	23.5%614/2612
fetching	100.0%4/4	50.0%2/4	75.0%3/4	25.0%1/4	0.0%0/4	0.0%0/4
fill-stroke	50.2%206/410	32.4%133/410	92.2%378/410	49.3%202/410	22.0%90/410	22.9%94/410
filter-effects	98.2%3299/3361	98.3%3304/3361	94.9%3188/3361	91.8%3085/3361	31.7%1065/3361	47.0%1578/3361
geometry	99.6%1564/1571	98.9%1554/1571	99.5%1563/1571	99.8%1568/1571	99.9%1569/1571	1.0%15/1571
mediaqueries	98.6%1800/1826	93.8%1713/1826	93.5%1707/1826	94.2%1720/1826	85.2%1556/1826	2.4%44/1826
motion	99.4%5027/5057	99.7%5041/5057	99.5%5032/5057	1.9%95/5057	1.8%89/5057	46.3%2343/5057
printing	100.0%31/31	93.5%29/31	3.2%1/31	3.2%1/31	3.2%1/31	71.0%22/31
reference	100.0%3/3	100.0%3/3	100.0%3/3	66.7%2/3	100.0%3/3	0.0%0/3
selectors	86.0%5501/6397	94.7%6056/6397	98.5%6300/6397	96.6%6182/6397	65.4%4186/6397	28.9%1850/6397