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 / fetch / api / cors

Spec: Fetch ↗

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 1.0-9ca42 (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	89.0%699/785	99.2%779/785	99.2%779/785	93.6%735/785	85.7%673/785	0.0%0/785

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	89.0%699/785	99.2%779/785	99.2%779/785	93.6%735/785	85.7%673/785	NO DATA
cors-basic.any.html	15/15	15/15	15/15	15/15	15/15	NOT RUN
cors-basic.any.worker.html	15/15	15/15	15/15	15/15	15/15	NOT RUN
cors-cookies-redirect.any.html	4/4	4/4	4/4	4/4	4/4	NOT RUN
cors-cookies-redirect.any.worker.html	4/4	4/4	4/4	2/4	4/4	NOT RUN
cors-cookies.any.html	6/6	6/6	6/6	6/6	6/6	NOT RUN
cors-cookies.any.worker.html	6/6	6/6	6/6	6/6	6/6	NOT RUN
cors-expose-star.sub.any.html	3/3	3/3	3/3	3/3	3/3	NOT RUN
cors-expose-star.sub.any.worker.html	3/3	3/3	3/3	3/3	3/3	NOT RUN
cors-filtering.sub.any.html	19/19	19/19	19/19	19/19	19/19	NOT RUN
cors-filtering.sub.any.worker.html	19/19	19/19	19/19	19/19	19/19	NOT RUN
cors-keepalive.any.html	15/95	95/95	95/95	69/95	15/95	NOT RUN
cors-multiple-origins.sub.any.html	6/6	6/6	6/6	6/6	6/6	NOT RUN
cors-multiple-origins.sub.any.serviceworker.html	6/6	6/6	6/6	0/6	0/6	NOT RUN
cors-multiple-origins.sub.any.sharedworker.html	6/6	6/6	6/6	6/6	6/6	NOT RUN
cors-multiple-origins.sub.any.worker.html	6/6	6/6	6/6	6/6	6/6	NOT RUN
cors-no-preflight.any.html	15/15	15/15	15/15	15/15	15/15	NOT RUN
cors-no-preflight.any.worker.html	15/15	15/15	15/15	15/15	15/15	NOT RUN
cors-origin.any.html	17/17	17/17	17/17	17/17	17/17	NOT RUN
cors-origin.any.worker.html	17/17	17/17	17/17	17/17	17/17	NOT RUN
cors-preflight-cache-tainted.any.html	2/2	2/2	2/2	2/2	2/2	NOT RUN
cors-preflight-cache-tainted.any.worker.html	2/2	2/2	2/2	2/2	2/2	NOT RUN
cors-preflight-cache.any.html	1/2	1/2	1/2	1/2	0/2	NOT RUN
cors-preflight-cache.any.worker.html	1/2	1/2	1/2	1/2	0/2	NOT RUN
cors-preflight-not-cors-safelisted.any.html	12/12	12/12	12/12	12/12	10/12	NOT RUN
cors-preflight-not-cors-safelisted.any.worker.html	12/12	12/12	12/12	12/12	10/12	NOT RUN
cors-preflight-redirect.any.html	10/10	10/10	10/10	10/10	10/10	NOT RUN
cors-preflight-redirect.any.serviceworker.html	10/10	10/10	10/10	0/10	0/10	NOT RUN
cors-preflight-redirect.any.sharedworker.html	10/10	10/10	10/10	10/10	10/10	NOT RUN
cors-preflight-redirect.any.worker.html	10/10	10/10	10/10	10/10	10/10	NOT RUN
cors-preflight-referrer.any.html	12/12	12/12	12/12	12/12	12/12	NOT RUN
cors-preflight-referrer.any.worker.html	12/12	12/12	12/12	12/12	12/12	NOT RUN
cors-preflight-response-validation.any.html	2/2	2/2	2/2	2/2	0/2	NOT RUN
cors-preflight-response-validation.any.worker.html	2/2	2/2	2/2	2/2	0/2	NOT RUN
cors-preflight-star.any.html	33/34	33/34	33/34	33/34	33/34	NOT RUN
cors-preflight-star.any.worker.html	33/34	33/34	33/34	33/34	33/34	NOT RUN
cors-preflight-status.any.html	27/27	27/27	27/27	27/27	27/27	NOT RUN
cors-preflight-status.any.worker.html	27/27	27/27	27/27	27/27	27/27	NOT RUN
cors-preflight-unterminated-body.any.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
cors-preflight-unterminated-body.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
cors-preflight.any.html	21/22	21/22	21/22	21/22	21/22	NOT RUN
cors-preflight.any.worker.html	21/22	21/22	21/22	21/22	21/22	NOT RUN
cors-redirect-credentials.any.html	65/65	65/65	65/65	65/65	65/65	NOT RUN
cors-redirect-credentials.any.worker.html	65/65	65/65	65/65	65/65	65/65	NOT RUN
cors-redirect-preflight.any.html	30/30	30/30	30/30	30/30	30/30	NOT RUN
cors-redirect-preflight.any.worker.html	30/30	30/30	30/30	30/30	30/30	NOT RUN
cors-redirect.any.html	20/20	20/20	20/20	20/20	20/20	NOT RUN
cors-redirect.any.worker.html	20/20	20/20	20/20	20/20	20/20	NOT RUN
data-url-iframe.html	3/3	3/3	3/3	3/3	3/3	NOT RUN
data-url-shared-worker.html	3/3	3/3	3/3	3/3	3/3	NOT RUN
data-url-worker.html	3/3	3/3	3/3	3/3	3/3	NOT RUN
sandboxed-iframe.html	PASS	PASS	PASS	PASS	PASS	NOT RUN