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.
Spec: CSS ↗
Runs: Chrome 155.0.8039.0 (wpt@2a20f1bd6, 2026-09-03) | Firefox 157.0a1 (wpt@b861d4d9d, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a9df8 (wpt@9b4cabf6d, 2026-09-03) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
Sort areas: alphabetical | by subtest count
| Area | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Total | 98.6%8679/8805 | 98.2%8646/8805 | 96.1%8464/8805 | 90.7%7986/8805 | 92.6%8154/8805 | 70.2%6182/8805 |
| abspos | 97.0%32/33 | 97.0%32/33 | 97.0%32/33 | 81.8%27/33 | 97.0%32/33 | 33.3%11/33 |
| backgrounds | 98.8%335/339 | 98.8%335/339 | 89.4%303/339 | 90.9%308/339 | 95.9%325/339 | 68.4%232/339 |
| bidi-text | 97.1%102/105 | 95.2%100/105 | 92.4%97/105 | 57.1%60/105 | 78.1%82/105 | 35.2%37/105 |
| borders | 100.0%674/674 | 100.0%674/674 | 98.1%661/674 | 89.3%602/674 | 95.8%646/674 | 79.7%537/674 |
| box | 100.0%9/9 | 100.0%9/9 | 100.0%9/9 | 22.2%2/9 | 100.0%9/9 | 44.4%4/9 |
| box-display | 92.5%111/120 | 98.3%118/120 | 97.5%117/120 | 92.5%111/120 | 94.2%113/120 | 75.8%91/120 |
| cascade | 93.8%30/32 | 93.8%30/32 | 93.8%30/32 | 84.4%27/32 | 81.2%26/32 | 81.2%26/32 |
| cascade-import | 100.0%8/8 | 100.0%8/8 | 100.0%8/8 | 100.0%8/8 | 100.0%8/8 | 50.0%4/8 |
| colors | 100.0%19/19 | 100.0%19/19 | 57.9%11/19 | 100.0%19/19 | 100.0%19/19 | 52.6%10/19 |
| css1 | 97.6%160/164 | 98.2%161/164 | 95.7%157/164 | 78.7%129/164 | 93.3%153/164 | 57.3%94/164 |
| css21-errata | 33.3%3/9 | 66.7%6/9 | 33.3%3/9 | 66.7%6/9 | 66.7%6/9 | 44.4%4/9 |
| csswg-issues | 100.0%3/3 | 100.0%3/3 | 100.0%3/3 | 33.3%1/3 | 100.0%3/3 | 33.3%1/3 |
| floats | 94.4%203/215 | 94.9%204/215 | 90.7%195/215 | 86.0%185/215 | 90.2%194/215 | 71.6%154/215 |
| floats-clear | 100.0%258/258 | 98.1%253/258 | 98.1%253/258 | 86.4%223/258 | 94.2%243/258 | 73.6%190/258 |
| fonts | 98.1%157/160 | 98.8%158/160 | 98.1%157/160 | 95.0%152/160 | 90.0%144/160 | 78.1%125/160 |
| generated-content | 95.6%216/226 | 97.8%221/226 | 92.5%209/226 | 76.1%172/226 | 72.6%164/226 | 11.9%27/226 |
| linebox | 99.3%853/859 | 99.7%856/859 | 99.4%854/859 | 97.1%834/859 | 85.0%730/859 | 75.6%649/859 |
| lists | 100.0%156/156 | 100.0%156/156 | 99.4%155/156 | 88.5%138/156 | 62.8%98/156 | 36.5%57/156 |
| margin-padding-clear | 99.3%677/682 | 99.1%676/682 | 99.1%676/682 | 95.5%651/682 | 98.8%674/682 | 95.0%648/682 |
| media | 100.0%17/17 | 100.0%17/17 | 100.0%17/17 | 100.0%17/17 | 100.0%17/17 | 100.0%17/17 |
| normal-flow | 99.6%904/908 | 96.5%876/908 | 94.7%860/908 | 89.1%809/908 | 98.7%896/908 | 73.6%668/908 |
| other-formats | 100.0%1/1 | 100.0%1/1 | 100.0%1/1 | 100.0%1/1 | 100.0%1/1 | 100.0%1/1 |
| pagination | 90.7%39/43 | 97.7%42/43 | 0.0%0/43 | 0.0%0/43 | 0.0%0/43 | 90.7%39/43 |
| positioning | 99.8%532/533 | 99.8%532/533 | 97.2%518/533 | 96.4%514/533 | 99.8%532/533 | 68.1%363/533 |
| sec5 | 100.0%23/23 | 100.0%23/23 | 100.0%23/23 | 95.7%22/23 | 95.7%22/23 | 95.7%22/23 |
| selectors | 97.7%468/479 | 90.6%434/479 | 97.1%465/479 | 95.2%456/479 | 94.6%453/479 | 18.0%86/479 |
| stacking-context | 100.0%7/7 | 100.0%7/7 | 100.0%7/7 | 100.0%7/7 | 100.0%7/7 | 57.1%4/7 |
| syntax | 99.8%1464/1467 | 99.8%1464/1467 | 99.8%1464/1467 | 99.5%1460/1467 | 98.8%1450/1467 | 95.5%1401/1467 |
| tables | 95.2%434/456 | 98.0%447/456 | 87.1%397/456 | 68.0%310/456 | 95.0%433/456 | 37.3%170/456 |
| text | 98.1%403/411 | 97.3%400/411 | 97.3%400/411 | 93.2%383/411 | 83.0%341/411 | 65.5%269/411 |
| ui | 100.0%52/52 | 100.0%52/52 | 100.0%52/52 | 100.0%52/52 | 100.0%52/52 | 100.0%52/52 |
| values | 88.0%22/25 | 96.0%24/25 | 100.0%25/25 | 92.0%23/25 | 80.0%20/25 | 72.0%18/25 |
| visudet | 87.2%34/39 | 89.7%35/39 | 89.7%35/39 | 53.8%21/39 | 64.1%25/39 | 38.5%15/39 |
| visufx | 100.0%188/188 | 100.0%188/188 | 98.9%186/188 | 100.0%188/188 | 84.0%158/188 | 57.4%108/188 |
| visuren | 100.0%39/39 | 100.0%39/39 | 97.4%38/39 | 87.2%34/39 | 100.0%39/39 | 41.0%16/39 |
| zindex | 100.0%31/31 | 100.0%31/31 | 100.0%31/31 | 90.3%28/31 | 100.0%31/31 | 83.9%26/31 |
| zorder | 100.0%1/1 | 100.0%1/1 | 100.0%1/1 | 0.0%0/1 | 100.0%1/1 | 0.0%0/1 |
| Test | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| bidi-005.xht | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| bidi-006.xht | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| bidi-007.xht | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| bidi-008.xht | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| bidi-009.xht | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| bidi-010.xht | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| border-seams-001.xht | PASS | PASS | PASS | FAIL | PASS | FAIL |
| css-e-notation-test-1.html | PASS | PASS | PASS | PASS | PASS | PASS |
| css-e-notation-test-2.html | PASS | PASS | PASS | PASS | PASS | PASS |
| inline-svg-100-percent-in-body.html | PASS | PASS | PASS | PASS | PASS | PASS |
| inline-svg-intrinsic-size-100-percent-1.html | PASS | PASS | PASS | PASS | FAIL | PASS |
| inline-svg-intrinsic-size-100-percent-2.html | PASS | PASS | PASS | PASS | PASS | FAIL |
| inline-svg-margin-padding-border.html | PASS | PASS | PASS | PASS | PASS | PASS |
| replace-root-with-trailing-comment-crash.html | PASS | PASS | PASS | TIMEOUT | PASS | PASS |