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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 / speculation-rules / prefetch

Spec: Speculation Rules ↗

Runs: Chrome 158.0.8110.0 (wpt@850b36a56, 2026-10-18) | Firefox 160.0a1 (wpt@b58866519, 2026-10-18) | Safari 254 preview (wpt@850b36a56, 2026-10-18) | Ladybird 1.0-e7b21 (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
Total88.8%222/25059.6%149/25059.2%148/2500.0%0/2500.0%0/2500.0%0/250
anonymous0.0%0/20.0%0/20.0%0/20.0%0/20.0%0/20.0%0/2
client-hints100.0%14/1464.2%9/1464.2%9/140.0%0/140.0%0/140.0%0/14
no-vary-search100.0%58/5862.0%36/5834.4%20/580.0%0/580.0%0/580.0%0/58
tentative70.7%29/4119.5%8/4119.5%8/410.0%0/410.0%0/410.0%0/41
TestChromeFirefoxSafariLadybirdServoBlitz
Total89.6%121/13571.1%96/13582.2%111/1350.0%0/1350.0%0/135NO DATA
clear-prefetch-cache-after-clear-site-data-cache.https.html2/21/21/20/20/2NOT RUN
cross-origin-cookies.https.htmlPASSFAILFAILERRORERRORNOT RUN
different-initiators-2.https.htmlPASSPASSPASSERRORERRORNOT RUN
different-initiators.sub.https.html?cross-site-1PASSPASSPASSERRORERRORNOT RUN
different-initiators.sub.https.html?cross-site-2PASSPASSFAILERRORERRORNOT RUN
different-initiators.sub.https.html?same-sitePASSPASSFAILERRORERRORNOT RUN
document-rules-details-element.https.html2/22/22/20/20/2NOT RUN
document-rules-pending-stylesheet.https.htmlPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=andPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=baseURLChangedByBaseElementPASSFAILPASSERRORERRORNOT RUN
document-rules.https.html?include=baseURLChangedBySameDocumentNavigationPASSFAILPASSERRORERRORNOT RUN
document-rules.https.html?include=defaultPredicatePASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=hrefMatchesPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=immediateMutationPASSFAILPASSERRORERRORNOT RUN
document-rules.https.html?include=invalidPredicatePASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=linkHrefChangedPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=linkInShadowTreePASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=linkToSelfFragmentPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=newRuleSetAddedPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=notPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=orPASSPASSPASSERRORERRORNOT RUN
document-rules.https.html?include=selectorMatchesPASSFAILPASSERRORERRORNOT RUN
document-rules.https.html?include=selectorMatchesDisplayLockedPASSFAILPASSERRORERRORNOT RUN
document-rules.https.html?include=selectorMatchesDisplayNonePASSFAILPASSERRORERRORNOT RUN
document-rules.https.html?include=selectorMatchesScopingRootPASSFAILPASSERRORERRORNOT RUN
document-rules.https.html?include=unslottedLinkPASSPASSPASSERRORERRORNOT RUN
duplicate-urls.https.htmlPASSPASSPASSERRORERRORNOT RUN
fragment.https.htmlPASSPASSPASSERRORERRORNOT RUN
implicit-source.https.htmlPASSFAILPASSERRORERRORNOT RUN
initiators-a-element.sub.https.html?cross-site0/20/20/20/20/2NOT RUN
initiators-a-element.sub.https.html?same-site2/21/22/20/20/2NOT RUN
initiators-iframe-location-href.sub.https.html?cross-sitePASSPASSPASSERRORERRORNOT RUN
initiators-iframe-location-href.sub.https.html?same-sitePASSPASSPASSERRORERRORNOT RUN
initiators-window-open.sub.https.html?cross-site0/20/20/20/20/2NOT RUN
initiators-window-open.sub.https.html?same-site2/20/22/20/20/2NOT RUN
inline-speculation-rules-after-stylesheet.https.htmlPASSPASSPASSERRORERRORNOT RUN
list-rule-eagerness-conservative-pointerdown-preventdefault.tentative.https.html2/22/20/20/20/2NOT RUN
list-rule-eagerness-conservative-pointerdown.https.htmlPASSPASSFAILERRORERRORNOT RUN
list-rule-eagerness-eager-hover.tentative.https.htmlPASSPASSFAILERRORERRORNOT RUN
list-rule-eagerness-moderate-hover.https.htmlPASSPASSFAILERRORERRORNOT RUN
multiple-url.https.htmlPASSPASSPASSERRORERRORNOT RUN
mutate-rules.https.html3/33/33/30/30/3NOT RUN
navigation-timing-delivery-type.https.html?prefetch=false&bypass_cache=falsePASSPASSPASSERRORERRORNOT RUN
navigation-timing-delivery-type.https.html?prefetch=false&bypass_cache=truePASSPASSPASSERRORERRORNOT RUN
navigation-timing-delivery-type.https.html?prefetch=true&bypass_cache=falsePASSFAILPASSERRORERRORNOT RUN
navigation-timing-delivery-type.https.html?prefetch=true&bypass_cache=truePASSPASSPASSERRORERRORNOT RUN
navigation-timing-requestStart-responseStart.https.html?include=afterResponsePASSPASSPASSERRORERRORNOT RUN
navigation-timing-requestStart-responseStart.https.html?include=noPrefetchPASSPASSPASSERRORERRORNOT RUN
navigation-timing-requestStart-responseStart.https.html?include=waitingForRedirectPASSPASSPASSERRORERRORNOT RUN
navigation-timing-requestStart-responseStart.https.html?include=waitingForResponsePASSFAILPASSERRORERRORNOT RUN
navigation-timing-sizes.https.html?bypass_cache=truePASSPASSPASSERRORERRORNOT RUN
navigation-timing-sizes.https.html?defaultPASSPASSPASSERRORERRORNOT RUN
navigation-timing-sizes.https.html?prefetch=truePASSFAILPASSERRORERRORNOT RUN
navigation-timing-sizes.https.html?prefetch=true&bypass_cache=truePASSFAILPASSERRORERRORNOT RUN
no-http-cache-interference.https.htmlPASSPASSPASSERRORERRORNOT RUN
no-prefetch-for-post.https.htmlPASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=BaseCasePASSFAILPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=CSPExemptionPASSFAILPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=EmptyRuleSetPASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=FailCORSPASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=FailToParseRuleSetPASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=FailToParseSpeculationRulesHeaderPASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=FollowRedirectPASSFAILPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=InnerListInSpeculationRulesHeaderPASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=InvalidMimeTypePASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=InvalidUrlForSpeculationRulesSetPASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=RelativeUrlForCandidatePASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=RelativeUrlForSpeculationRulesSetPASSFAILPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=StatusCode199PASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=StatusCode404PASSPASSPASSERRORERRORNOT RUN
out-of-document-rule-set.https.html?include=UseNonUTF8EncodingForSpeculationRulesSetPASSPASSPASSERRORERRORNOT RUN
prefetch-single.https.html?from_protocol=http&to_protocol=httpPASSPASSPASSERRORERRORNOT RUN
prefetch-single.https.html?from_protocol=http&to_protocol=httpsFAILFAILFAILERRORERRORNOT RUN
prefetch-single.https.html?from_protocol=https&to_protocol=httpPASSPASSPASSERRORERRORNOT RUN
prefetch-single.https.html?from_protocol=https&to_protocol=httpsPASSPASSPASSERRORERRORNOT RUN
prefetch-status.https.html?status=200&should_prefetch=truePASSPASSPASSERRORERRORNOT RUN
prefetch-status.https.html?status=250&should_prefetch=truePASSPASSPASSERRORERRORNOT RUN
prefetch-status.https.html?status=299&should_prefetch=truePASSPASSPASSERRORERRORNOT RUN
prefetch-status.https.html?status=400&should_prefetch=falsePASSPASSPASSERRORERRORNOT RUN
prefetch-status.https.html?status=500&should_prefetch=falsePASSPASSPASSERRORERRORNOT RUN
prefetch-traverse-reload.sub.html3/31/31/30/30/3NOT RUN
prefetch-uses-cache.sub.https.html?cross-siteFAILFAILFAILERRORERRORNOT RUN
prefetch-uses-cache.sub.https.html?same-sitePASSPASSPASSERRORERRORNOT RUN
redirect-middle-of-prefetch.https.html?origin=cross-site-initial2/22/22/20/20/2NOT RUN
redirect-middle-of-prefetch.https.html?origin=cross-site-redirect2/22/22/20/20/2NOT RUN
redirect-middle-of-prefetch.https.html?origin=same-origin2/22/22/20/20/2NOT RUN
redirect-to-prefetch-url.https.html?origin=cross-site-initial2/22/22/20/20/2NOT RUN
redirect-to-prefetch-url.https.html?origin=cross-site-redirect2/22/22/20/20/2NOT RUN
redirect-to-prefetch-url.https.html?origin=same-origin0/22/22/20/20/2NOT RUN
redirect-url.https.html?origin=cross-site-initial0/20/20/20/20/2NOT RUN
redirect-url.https.html?origin=cross-site-redirect0/20/20/20/20/2NOT RUN
redirect-url.https.html?origin=same-origin2/22/22/20/20/2NOT RUN
referrer-policy-from-rules.https.html?1-1PASSPASSPASSERRORERRORNOT RUN
referrer-policy-from-rules.https.html?2-2PASSPASSPASSERRORERRORNOT RUN
referrer-policy-from-rules.https.html?3-3FAILFAILFAILERRORERRORNOT RUN
referrer-policy-from-rules.https.html?4-4PASSPASSPASSERRORERRORNOT RUN
referrer-policy-from-rules.https.html?5-5PASSPASSPASSERRORERRORNOT RUN
referrer-policy-from-rules.https.html?6-6PASSPASSPASSERRORERRORNOT RUN
referrer-policy-from-rules.https.html?7-7PASSPASSPASSERRORERRORNOT RUN
referrer-policy-from-rules.https.html?8-lastPASSPASSPASSERRORERRORNOT RUN
referrer-policy-not-accepted.https.html?1-1PASSPASSPASSERRORERRORNOT RUN
referrer-policy-not-accepted.https.html?2-2PASSPASSPASSERRORERRORNOT RUN
referrer-policy-not-accepted.https.html?3-lastPASSPASSPASSERRORERRORNOT RUN
referrer-policy.https.html?1-1PASSPASSPASSERRORERRORNOT RUN
referrer-policy.https.html?2-2PASSPASSPASSERRORERRORNOT RUN
referrer-policy.https.html?3-3PASSPASSPASSERRORERRORNOT RUN
referrer-policy.https.html?4-lastPASSPASSPASSERRORERRORNOT RUN
same-origin-cookies.https.html?1-1PASSPASSPASSERRORERRORNOT RUN
same-origin-cookies.https.html?2-lastPASSPASSPASSERRORERRORNOT RUN
sec-fetch-headers.https.html4/40/44/40/40/4NOT RUN
user-pass.https.html?cross-origin=falsePASSPASSERRORERRORERRORNOT RUN
user-pass.https.html?cross-origin=trueTIMEOUTTIMEOUTERRORERRORERRORNOT RUN