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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 / fs

Spec: File System ↗

Runs: Chrome 158.0.8110.0 (wpt@456f346c2, 2026-10-18) | Firefox 160.0a1 (wpt@b58866519, 2026-10-18) | Safari 254 preview (wpt@470a7adf8, 2026-10-18) | Ladybird 1.0-b284f (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 month3 months6 months1 year2 years4 yearsAll time
0%20%40%60%80%100%Nov 2025Dec 2025Jan 2026Feb 2026Mar 2026Apr 2026May 2026Jun 2026Jul 2026Aug 2026Sep 2026Oct 2026ChromeFirefoxSafariLadybirdServo

Sort: alphabetical | by subtest count

AreaChromeFirefoxSafariLadybirdServoBlitz
Total97.3%1091/112180.5%903/112170.9%795/11211.3%15/11211.3%15/11210.0%0/1121
TestChromeFirefoxSafariLadybirdServoBlitz
Total97.3%1091/112180.5%903/112170.9%795/11211.3%15/11211.3%15/1121NO DATA
FileSystemBaseHandle-IndexedDB-deferred-deserialization.https.any.html2/22/22/20/20/2NOT RUN
FileSystemBaseHandle-IndexedDB-deferred-deserialization.https.any.serviceworker.html2/22/22/20/20/2NOT RUN
FileSystemBaseHandle-IndexedDB-deferred-deserialization.https.any.sharedworker.html2/22/22/20/20/2NOT RUN
FileSystemBaseHandle-IndexedDB-deferred-deserialization.https.any.worker.html2/22/22/20/20/2NOT RUN
FileSystemBaseHandle-IndexedDB.https.any.html6/66/66/60/60/6NOT RUN
FileSystemBaseHandle-IndexedDB.https.any.serviceworker.html6/66/66/60/60/6NOT RUN
FileSystemBaseHandle-IndexedDB.https.any.sharedworker.html6/66/66/60/60/6NOT RUN
FileSystemBaseHandle-IndexedDB.https.any.worker.html6/66/66/60/60/6NOT RUN
FileSystemBaseHandle-buckets.https.any.html3/30/30/30/30/3NOT RUN
FileSystemBaseHandle-buckets.https.any.serviceworker.html3/30/30/30/30/3NOT RUN
FileSystemBaseHandle-buckets.https.any.sharedworker.html3/30/30/30/30/3NOT RUN
FileSystemBaseHandle-buckets.https.any.worker.html3/30/30/30/30/3NOT RUN
FileSystemBaseHandle-getUniqueId.https.any.html11/110/110/110/110/11NOT RUN
FileSystemBaseHandle-getUniqueId.https.any.serviceworker.html11/110/110/110/110/11NOT RUN
FileSystemBaseHandle-getUniqueId.https.any.sharedworker.html11/110/110/110/110/11NOT RUN
FileSystemBaseHandle-getUniqueId.https.any.worker.html11/110/110/110/110/11NOT RUN
FileSystemBaseHandle-isSameEntry.https.any.html14/1414/1414/140/140/14NOT RUN
FileSystemBaseHandle-isSameEntry.https.any.serviceworker.html14/1414/1414/140/140/14NOT RUN
FileSystemBaseHandle-isSameEntry.https.any.sharedworker.html14/1414/1414/140/140/14NOT RUN
FileSystemBaseHandle-isSameEntry.https.any.worker.html14/1414/1414/140/140/14NOT RUN
FileSystemBaseHandle-postMessage-BroadcastChannel.https.window.htmlPASSPASSPASSFAILFAILNOT RUN
FileSystemBaseHandle-postMessage-Error.https.window.html10/1010/1010/100/100/10NOT RUN
FileSystemBaseHandle-postMessage-MessagePort-frames.https.window.html4/44/44/40/40/4NOT RUN
FileSystemBaseHandle-postMessage-MessagePort-windows.https.window.html3/33/33/30/30/3NOT RUN
FileSystemBaseHandle-postMessage-MessagePort-workers.https.window.html3/33/33/30/30/3NOT RUN
FileSystemBaseHandle-postMessage-frames.https.window.html4/44/44/40/40/4NOT RUN
FileSystemBaseHandle-postMessage-insecure-context.https.window.html3/31/31/31/31/3NOT RUN
FileSystemBaseHandle-postMessage-windows.https.window.html3/33/33/30/30/3NOT RUN
FileSystemBaseHandle-postMessage-workers.https.window.html3/33/33/30/30/3NOT RUN
FileSystemBaseHandle-remove.https.any.html9/90/90/90/90/9NOT RUN
FileSystemBaseHandle-remove.https.any.serviceworker.html9/90/90/90/90/9NOT RUN
FileSystemBaseHandle-remove.https.any.sharedworker.html9/90/90/90/90/9NOT RUN
FileSystemBaseHandle-remove.https.any.worker.html9/90/90/90/90/9NOT RUN
FileSystemDirectoryHandle-getDirectoryHandle.https.any.html10/1010/1010/100/100/10NOT RUN
FileSystemDirectoryHandle-getDirectoryHandle.https.any.serviceworker.html10/1010/1010/100/100/10NOT RUN
FileSystemDirectoryHandle-getDirectoryHandle.https.any.sharedworker.html10/1010/1010/100/100/10NOT RUN
FileSystemDirectoryHandle-getDirectoryHandle.https.any.worker.html10/1010/1010/100/100/10NOT RUN
FileSystemDirectoryHandle-getFileHandle.https.any.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-getFileHandle.https.any.serviceworker.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-getFileHandle.https.any.sharedworker.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-getFileHandle.https.any.worker.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-iteration.https.any.html6/66/66/60/60/6NOT RUN
FileSystemDirectoryHandle-iteration.https.any.serviceworker.html6/66/66/60/60/6NOT RUN
FileSystemDirectoryHandle-iteration.https.any.sharedworker.html6/66/66/60/60/6NOT RUN
FileSystemDirectoryHandle-iteration.https.any.worker.html6/66/66/60/60/6NOT RUN
FileSystemDirectoryHandle-removeEntry.https.any.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-removeEntry.https.any.serviceworker.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-removeEntry.https.any.sharedworker.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-removeEntry.https.any.worker.html13/1313/1313/130/130/13NOT RUN
FileSystemDirectoryHandle-resolve.https.any.html5/55/55/50/50/5NOT RUN
FileSystemDirectoryHandle-resolve.https.any.serviceworker.html5/55/55/50/50/5NOT RUN
FileSystemDirectoryHandle-resolve.https.any.sharedworker.html5/55/55/50/50/5NOT RUN
FileSystemDirectoryHandle-resolve.https.any.worker.html5/55/55/50/50/5NOT RUN
FileSystemFileHandle-create-sync-access-handle.https.window.htmlPASSPASSPASSFAILFAILNOT RUN
FileSystemFileHandle-cross-primitive-locking.https.tentative.worker.html66/9055/9017/900/900/90NOT RUN
FileSystemFileHandle-getFile.https.any.html3/33/33/30/30/3NOT RUN
FileSystemFileHandle-getFile.https.any.serviceworker.html3/33/33/30/30/3NOT RUN
FileSystemFileHandle-getFile.https.any.sharedworker.html3/33/33/30/30/3NOT RUN
FileSystemFileHandle-getFile.https.any.worker.html3/33/33/30/30/3NOT RUN
FileSystemFileHandle-move.https.any.html24/2423/249/240/240/24NOT RUN
FileSystemFileHandle-move.https.any.serviceworker.html24/2423/249/240/240/24NOT RUN
FileSystemFileHandle-move.https.any.sharedworker.html24/2423/249/240/240/24NOT RUN
FileSystemFileHandle-move.https.any.worker.html24/2423/249/240/240/24NOT RUN
FileSystemFileHandle-sync-access-handle-back-forward-cache.https.tentative.window.html2/21/21/20/20/2NOT RUN
FileSystemFileHandle-sync-access-handle-lock-modes.https.tentative.worker.html33/3322/3311/330/330/33NOT RUN
FileSystemFileHandle-writable-file-stream-back-forward-cache.https.tentative.window.html2/21/21/20/20/2NOT RUN
FileSystemFileHandle-writable-file-stream-lock-modes.https.tentative.worker.html15/155/155/150/150/15NOT RUN
FileSystemObserver-sync-access-handle.https.tentative.worker.html3/40/40/40/40/4NOT RUN
FileSystemObserver-unsupported-global.https.tentative.any.serviceworker.htmlPASSPASSPASSERRORERRORNOT RUN
FileSystemObserver-writable-file-stream.https.tentative.any.html2/20/20/20/20/2NOT RUN
FileSystemObserver-writable-file-stream.https.tentative.any.sharedworker.html2/20/20/20/20/2NOT RUN
FileSystemObserver-writable-file-stream.https.tentative.any.worker.html2/20/20/20/20/2NOT RUN
FileSystemObserver.https.tentative.any.html16/160/160/160/160/16NOT RUN
FileSystemObserver.https.tentative.any.sharedworker.html16/160/160/160/160/16NOT RUN
FileSystemObserver.https.tentative.any.worker.html16/160/160/160/160/16NOT RUN
FileSystemSyncAccessHandle-close.https.worker.html6/66/66/60/60/6NOT RUN
FileSystemSyncAccessHandle-flush.https.worker.html2/22/22/20/20/2NOT RUN
FileSystemSyncAccessHandle-getSize.https.worker.htmlPASSPASSPASSFAILFAILNOT RUN
FileSystemSyncAccessHandle-read-write.https.worker.html14/1414/1414/140/140/14NOT RUN
FileSystemSyncAccessHandle-truncate.https.worker.html3/33/33/30/30/3NOT RUN
FileSystemWritableFileStream-piped.https.any.html8/88/88/80/80/8NOT RUN
FileSystemWritableFileStream-piped.https.any.serviceworker.html8/88/88/80/80/8NOT RUN
FileSystemWritableFileStream-piped.https.any.sharedworker.html8/88/88/80/80/8NOT RUN
FileSystemWritableFileStream-piped.https.any.worker.html8/88/88/80/80/8NOT RUN
FileSystemWritableFileStream-write.https.any.html31/3131/3131/310/310/31NOT RUN
FileSystemWritableFileStream-write.https.any.serviceworker.html31/3131/3131/310/310/31NOT RUN
FileSystemWritableFileStream-write.https.any.sharedworker.html31/3131/3131/310/310/31NOT RUN
FileSystemWritableFileStream-write.https.any.worker.html31/3131/3131/310/310/31NOT RUN
FileSystemWritableFileStream.https.any.html8/98/98/90/90/9NOT RUN
FileSystemWritableFileStream.https.any.serviceworker.html8/98/98/90/90/9NOT RUN
FileSystemWritableFileStream.https.any.sharedworker.html8/98/98/90/90/9NOT RUN
FileSystemWritableFileStream.https.any.worker.html8/98/98/90/90/9NOT RUN
idlharness.https.any.html43/4343/4343/435/435/43NOT RUN
idlharness.https.any.serviceworker.html43/4343/4342/430/430/43NOT RUN
idlharness.https.any.sharedworker.html43/4343/4342/435/435/43NOT RUN
idlharness.https.any.worker.html54/5454/5454/544/544/54NOT RUN
opaque-origin.https.window.html2/33/32/30/30/3NOT RUN
opfs-shared-worker-coep.https.window.htmlPASSPASSPASSFAILFAILNOT RUN
root-name.https.any.htmlPASSPASSPASSFAILFAILNOT RUN
root-name.https.any.serviceworker.htmlPASSPASSPASSERRORERRORNOT RUN
root-name.https.any.sharedworker.htmlPASSPASSPASSFAILFAILNOT RUN
root-name.https.any.worker.htmlPASSPASSPASSFAILFAILNOT RUN