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 158.0.8110.0 (wpt@831ff48a8, 2026-10-18) | Firefox 160.0a1 (wpt@b58866519, 2026-10-18) | Safari 254 preview (wpt@470a7adf8, 2026-10-18) | Ladybird 1.0-ecff1 (wpt@850b36a56, 2026-10-18) | Servo Servo 0.7 (wpt@df642c414, 2026-10-17) | Blitz fb8d6c15e (wpt@cd1d8aa5b, 2026-10-17)

Score history

Percentage of subtests passing over time, one master run per day. Every engine's percentage is relative to the same denominator: the total number of subtests known to any engine in the latest runs (so lines are not distorted by tests being added to WPT, and an engine that skips tests is not flattered for it).

1 month 3 months 6 months 1 year 2 years 4 years All time

Sort: alphabetical | by subtest count

Area	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	95.4%212187/222322	86.4%192128/222322	88.9%197697/222322	74.5%165851/222322	51.7%115011/222322	53.3%118644/222322
CSS2	98.5%8694/8820	98.1%8660/8820	95.9%8466/8820	93.2%8224/8820	92.6%8172/8820	78.5%6926/8820
WOFF2	97.9%292/298	97.9%292/298	98.3%293/298	98.3%293/298	97.9%292/298	98.3%293/298
compositing	95.7%223/233	93.1%217/233	90.1%210/233	92.2%215/233	87.9%205/233	68.6%160/233
css-align	99.0%5324/5373	88.6%4765/5373	90.6%4869/5373	68.3%3675/5373	75.6%4067/5373	93.0%5002/5373
css-anchor-position	99.8%13904/13928	98.7%13760/13928	99.2%13830/13928	81.0%11288/13928	13.9%1941/13928	25.4%3538/13928
css-animations	98.4%1486/1509	93.7%1414/1509	97.0%1464/1509	72.2%1090/1509	50.6%765/1509	54.0%816/1509
css-backgrounds	96.2%6704/6966	95.1%6629/6966	97.3%6783/6966	92.1%6420/6966	73.4%5116/6966	73.4%5115/6966
css-borders	86.6%1547/1785	69.3%1238/1785	70.7%1263/1785	61.2%1094/1785	21.2%380/1785	62.4%1115/1785
css-box	91.2%1033/1132	83.7%948/1132	90.7%1027/1132	84.0%952/1132	61.9%701/1132	62.1%704/1132
css-break	98.1%1913/1950	52.1%1016/1950	66.9%1305/1950	42.3%826/1950	15.8%310/1950	16.3%319/1950
css-cascade	98.8%1795/1816	93.8%1704/1816	94.9%1724/1816	86.3%1568/1816	61.5%1117/1816	42.4%770/1816
css-color	93.6%12192/13020	91.4%11903/13020	97.1%12648/13020	87.7%11424/13020	90.1%11742/13020	87.8%11435/13020
css-color-adjust	97.9%187/191	97.9%187/191	74.8%143/191	60.7%116/191	57.5%110/191	71.2%136/191
css-color-hdr	99.1%115/116	14.6%17/116	26.7%31/116	14.6%17/116	14.6%17/116	14.6%17/116
css-conditional	96.5%3375/3494	89.4%3126/3494	89.1%3116/3494	93.0%3252/3494	64.1%2241/3494	53.5%1870/3494
css-contain	98.7%980/992	92.9%922/992	97.3%966/992	70.9%704/992	38.9%386/992	46.8%465/992
css-content	97.5%314/322	95.3%307/322	93.1%300/322	87.8%283/322	83.5%269/322	77.0%248/322
css-counter-styles	95.7%385/402	95.2%383/402	93.7%377/402	90.0%362/402	18.4%74/402	20.3%82/402
css-device-adapt	71.4%5/7	71.4%5/7	71.4%5/7	71.4%5/7	28.5%2/7	28.5%2/7
css-display	82.8%646/780	72.9%569/780	67.0%523/780	78.4%612/780	56.5%441/780	46.7%365/780
css-easing	87.9%139/158	87.3%138/158	98.7%156/158	87.9%139/158	72.7%115/158	73.4%116/158
css-env	100.0%53/53	90.5%48/53	90.5%48/53	75.4%40/53	90.5%48/53	90.5%48/53
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%5768/5825	96.1%5598/5825	95.3%5553/5825	86.4%5036/5825	70.8%4126/5825	86.1%5017/5825
css-font-loading	80.8%202/250	77.9%195/250	70.3%176/250	73.6%184/250	53.2%133/250	7.9%20/250
css-fonts	96.5%8745/9054	95.1%8613/9054	95.2%8623/9054	78.3%7092/9054	68.1%6172/9054	73.1%6623/9054
css-forced-color-adjust	100.0%14/14	85.7%12/14	42.8%6/14	42.8%6/14	42.8%6/14	85.7%12/14
css-forms	98.1%108/110	32.7%36/110	50.0%55/110	30.9%34/110	30.9%34/110	1.8%2/110
css-gaps	99.6%4684/4701	8.9%423/4701	8.8%417/4701	8.6%408/4701	7.8%368/4701	8.1%382/4701
css-grid	99.0%17432/17599	92.6%16314/17599	93.0%16379/17599	72.8%12826/17599	61.6%10857/17599	77.8%13698/17599
css-highlight-api	99.6%289/290	96.8%281/290	98.6%286/290	15.1%44/290	15.1%44/290	7.9%23/290
css-image-animation	14.8%4/27	11.1%3/27	18.5%5/27	22.2%6/27	18.5%5/27	55.5%15/27
css-images	99.0%4024/4063	96.4%3919/4063	96.4%3920/4063	88.5%3598/4063	89.2%3626/4063	87.4%3553/4063
css-inline	80.7%987/1223	91.7%1122/1223	61.8%757/1223	29.9%366/1223	35.4%433/1223	39.7%486/1223
css-layout-api	99.3%158/159	15.0%24/159	15.0%24/159	14.4%23/159	14.4%23/159	15.0%24/159
css-link-params	84.9%79/93	84.9%79/93	100.0%93/93	18.2%17/93	18.2%17/93	18.2%17/93
css-lists	91.3%1060/1160	94.3%1095/1160	69.3%804/1160	92.5%1073/1160	43.2%502/1160	69.5%807/1160
css-logical	94.2%1371/1454	94.0%1367/1454	99.9%1453/1454	92.4%1344/1454	65.7%956/1454	73.9%1075/1454
css-masking	73.1%5050/6901	72.1%4978/6901	97.4%6725/6901	51.5%3556/6901	30.9%2134/6901	54.2%3747/6901
css-mixins	98.2%607/618	17.9%111/618	78.1%483/618	75.4%466/618	17.9%111/618	10.6%66/618
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	99.4%2233/2245	80.5%1808/2245	75.9%1705/2245	76.2%1712/2245	40.2%904/2245	39.5%888/2245
css-namespaces	100.0%23/23	100.0%23/23	100.0%23/23	100.0%23/23	100.0%23/23	100.0%23/23
css-navigation	100.0%88/88	42.0%37/88	42.0%37/88	42.0%37/88	42.0%37/88	34.0%30/88
css-nesting	99.3%148/149	100.0%149/149	99.3%148/149	95.3%142/149	95.9%143/149	80.5%120/149
css-overflow	93.1%1803/1936	57.9%1121/1936	55.6%1078/1936	59.8%1158/1936	43.6%845/1936	34.4%667/1936
css-overscroll-behavior	92.6%101/109	90.8%99/109	66.0%72/109	85.3%93/109	17.4%19/109	65.1%71/109
css-page	88.4%361/408	60.5%247/408	28.6%117/408	36.5%149/408	11.2%46/408	29.9%122/408
css-paint-api	97.2%140/144	13.8%20/144	13.8%20/144	13.8%20/144	15.2%22/144	79.1%114/144
css-parser-api	7.0%5/71	7.0%5/71	7.0%5/71	7.0%5/71	7.0%5/71	7.0%5/71
css-position	99.7%1778/1782	89.7%1599/1782	88.3%1575/1782	80.8%1441/1782	70.7%1261/1782	64.3%1146/1782
css-properties-values-api	96.7%1360/1405	85.9%1207/1405	96.5%1357/1405	76.4%1074/1405	51.3%721/1405	38.1%536/1405
css-pseudo	94.0%1088/1157	74.3%860/1157	72.7%842/1157	64.9%752/1157	45.8%531/1157	16.5%192/1157
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	76.5%189/247	75.3%186/247	52.2%129/247	48.5%120/247	43.7%108/247	36.8%91/247
css-scroll-anchoring	95.0%97/102	96.0%98/102	85.2%87/102	22.5%23/102	23.5%24/102	7.8%8/102
css-scroll-snap	99.3%862/868	86.6%752/868	83.8%728/868	83.5%725/868	20.2%176/868	17.9%156/868
css-scrollbars	100.0%115/115	100.0%115/115	96.5%111/115	65.2%75/115	45.2%52/115	59.1%68/115
css-shadow	94.9%469/494	90.0%445/494	88.4%437/494	76.9%380/494	71.2%352/494	4.8%24/494
css-shapes	99.8%7752/7760	84.5%6559/7760	98.5%7651/7760	84.5%6561/7760	7.9%617/7760	9.2%717/7760
css-size-adjust	100.0%215/215	1.8%4/215	1.8%4/215	1.8%4/215	1.8%4/215	1.8%4/215
css-sizing	98.8%6740/6818	81.7%5575/6818	92.6%6320/6818	75.9%5177/6818	68.2%4654/6818	58.7%4007/6818
css-style-attr	100.0%16/16	100.0%16/16	100.0%16/16	87.5%14/16	100.0%16/16	93.7%15/16
css-syntax	98.6%442/448	77.4%347/448	99.3%445/448	92.8%416/448	74.7%335/448	91.9%412/448
css-tables	95.7%1083/1131	88.7%1004/1131	83.9%949/1131	74.3%841/1131	83.2%942/1131	52.5%594/1131
css-text	89.9%6590/7325	73.3%5372/7325	70.8%5193/7325	51.8%3797/7325	61.9%4535/7325	61.3%4496/7325
css-text-decor	95.1%1612/1694	96.3%1632/1694	89.7%1520/1694	77.8%1318/1694	46.7%792/1694	66.0%1119/1694
css-transforms	99.6%6317/6338	99.1%6286/6338	97.7%6196/6338	84.7%5372/6338	65.8%4172/6338	65.6%4161/6338
css-transitions	89.7%3103/3456	88.2%3050/3456	96.9%3351/3456	84.4%2918/3456	30.4%1052/3456	26.7%925/3456
css-typed-om	93.5%12582/13448	90.7%12200/13448	91.4%12296/13448	84.9%11429/13448	0.4%54/13448	0.3%48/13448
css-ui	97.4%3340/3429	93.7%3216/3429	93.9%3221/3429	89.9%3083/3429	66.2%2272/3429	77.1%2647/3429
css-values	95.3%10119/10607	60.0%6369/10607	68.6%7278/10607	61.0%6477/10607	55.0%5840/10607	54.4%5774/10607
css-variables	90.5%701/774	89.1%690/774	95.8%742/774	87.3%676/774	82.6%640/774	78.0%604/774
css-view-transitions	99.6%1771/1777	85.0%1512/1777	91.3%1624/1777	51.1%909/1777	42.6%758/1777	7.0%126/1777
css-viewport	99.2%890/897	79.5%714/897	93.8%842/897	53.5%480/897	43.9%394/897	35.0%314/897
css-will-change	100.0%221/221	100.0%221/221	98.6%218/221	96.3%213/221	95.4%211/221	90.4%200/221
css-writing-modes	96.0%1496/1558	96.5%1505/1558	92.1%1436/1558	32.4%505/1558	26.1%408/1558	41.3%645/1558
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	97.1%4331/4456	97.5%4347/4456	96.2%4289/4456	89.8%4004/4456	84.5%3767/4456	77.1%3439/4456
cssom-view	93.8%2476/2638	86.6%2287/2638	73.8%1949/2638	75.1%1982/2638	55.9%1477/2638	37.1%981/2638
fetching	100.0%4/4	50.0%2/4	75.0%3/4	50.0%2/4	50.0%2/4	0.0%0/4
fill-stroke	50.2%206/410	32.4%133/410	92.1%378/410	49.2%202/410	21.9%90/410	22.9%94/410
filter-effects	98.2%3304/3364	98.3%3310/3364	94.7%3189/3364	92.0%3096/3364	31.7%1068/3364	52.4%1763/3364
geometry	99.5%1568/1575	98.9%1558/1575	99.4%1567/1575	99.8%1572/1575	99.8%1573/1575	69.1%1089/1575
mediaqueries	98.6%1803/1827	93.7%1712/1827	93.5%1709/1827	94.0%1719/1827	85.1%1556/1827	2.6%49/1827
motion	99.4%5031/5061	99.6%5041/5061	99.5%5039/5061	1.8%95/5061	1.7%89/5061	48.9%2475/5061
printing	97.0%33/34	79.4%27/34	2.9%1/34	2.9%1/34	2.9%1/34	73.5%25/34
reference	100.0%3/3	100.0%3/3	100.0%3/3	66.6%2/3	100.0%3/3	66.6%2/3
selectors	85.2%5616/6591	93.7%6177/6591	97.3%6417/6591	95.7%6309/6591	65.1%4292/6591	37.5%2476/6591