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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 / css / css-backgrounds / animations

Spec: CSS Backgrounds ↗

Runs: Chrome 160.0.8162.0 (wpt@fa649586f, 2026-11-15) | Firefox 162.0a1 (wpt@fa649586f, 2026-11-15) | Safari 256 preview (wpt@fa649586f, 2026-11-15) | Ladybird 1.0-72e28 (wpt@c0f2b11f4, 2026-11-15) | Servo Servo 0.8 (wpt@76f3efc65, 2026-11-14) | Blitz ea07ee716 (wpt@bbb30d0f5, 2026-11-15)

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%Dec 2025Jan 2026Feb 2026Mar 2026Apr 2026May 2026Jun 2026Jul 2026Aug 2026Sep 2026Oct 2026Nov 2026ChromeFirefoxSafariLadybirdServoBlitz

Sort: alphabetical | by subtest count

AreaChromeFirefoxSafariLadybirdServoBlitz
Total47.3%2548/537846.4%2500/537849.4%2662/537848.6%2619/537868.0%3662/537834.8%1876/5378
invalidation100.0%4/4100.0%4/4100.0%4/4100.0%4/425.0%1/425.0%1/4
TestChromeFirefoxSafariLadybirdServoBlitz
Total47.3%2544/537446.4%2496/537449.4%2658/537448.6%2615/537468.1%3661/537434.8%1875/5374
background-color-animation-backdrop-infinite-duration-crash.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-custom-property.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-custom-timing-function-reverse.htmlPASSPASSPASSPASSTIMEOUTPASS
background-color-animation-custom-timing-function.htmlPASSPASSPASSPASSTIMEOUTPASS
background-color-animation-element-not-visible-at-current-viewport.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-fallback-additive-keyframe.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-fallback-missing-0-percent.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-fallback-missing-100-percent.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-fallback-replace.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-field-crash.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-fragmented.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-half-opaque.htmlPASSPASSPASSPASSTIMEOUTPASS
background-color-animation-in-body.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-non-empty-no-draw-crash.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-non-zero-size-element-change-to-zero.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-offset-position-not-stuck.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-pseudo-element.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-removed-element-crash.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-single-keyframe.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-three-keyframes1.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-three-keyframes2.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-three-keyframes3.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-will-change-contents.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-with-blur.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-with-images.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-with-mask.htmlPASSPASSPASSFAILTIMEOUTPASS
background-color-animation-with-table1.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-with-table2.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-with-table3.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-with-table4.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-with-zero-playbackRate.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-animation-zero-size-element-change-to-non-zero.htmlPASSPASSPASSPASSPASSPASS
background-color-animation-zero-size-element.htmlPASSPASSPASSPASSPASSPASS
background-color-animation.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-interpolation.html172/172168/172172/172172/172126/172126/172
background-color-scroll-into-viewport.htmlPASSPASSPASSPASSTIMEOUTPASS
background-color-transition-colormix.htmlPASSPASSPASSPASSFAILFAIL
background-color-transition-currentcolor.htmlPASSPASSPASSPASSTIMEOUTFAIL
background-color-transition.htmlPASSPASSPASSPASSPASSFAIL
background-color-transparent-animation-in-body.htmlPASSPASSPASSPASSPASSPASS
background-image-interpolation.html378/492450/492492/492450/492132/492376/492
background-position-composition.html70/7070/7070/7070/7035/7035/70
background-position-interpolation.html196/196196/196196/196196/196147/196147/196
background-position-origin-interpolation.html280/280280/280280/280280/280210/280210/280
background-position-x-interpolation.html112/112112/112112/112112/11284/11284/112
background-position-y-interpolation.html112/112112/112112/112112/11284/11284/112
background-size-composition.html84/8474/8484/8484/8438/8438/84
background-size-interpolation.html364/364330/364364/364364/364271/364271/364
border-bottom-left-radius-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN21/42NOT RUN
border-bottom-right-radius-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN21/42NOT RUN
border-bottom-width-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN40/40NOT RUN
border-color-interpolation.htmlNOT RUNNOT RUNNOT RUNNOT RUN108/144NOT RUN
border-image-outset-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN56/112NOT RUN
border-image-outset-interpolation.htmlNOT RUNNOT RUNNOT RUNNOT RUN126/168NOT RUN
border-image-slice-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN56/112NOT RUN
border-image-slice-interpolation-stability.htmlNOT RUNNOT RUNNOT RUNNOT RUNFAILNOT RUN
border-image-slice-interpolation.htmlNOT RUNNOT RUNNOT RUNNOT RUN343/434NOT RUN
border-image-source-interpolation.htmlNOT RUNNOT RUNNOT RUNNOT RUN245/294NOT RUN
border-image-width-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN56/112NOT RUN
border-image-width-interpolation.htmlNOT RUNNOT RUNNOT RUNNOT RUN443/558NOT RUN
border-left-width-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN40/40NOT RUN
border-radius-interpolation.htmlNOT RUNNOT RUNNOT RUNNOT RUN147/196NOT RUN
border-right-width-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN40/40NOT RUN
border-top-left-radius-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN21/42NOT RUN
border-top-right-radius-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN21/42NOT RUN
border-top-width-composition.htmlNOT RUNNOT RUNNOT RUNNOT RUN40/40NOT RUN
border-width-interpolation.htmlNOT RUNNOT RUNNOT RUNNOT RUN192/256NOT RUN
border-width-transition-with-style-change.htmlNOT RUNNOT RUNNOT RUNNOT RUNFAILNOT RUN
box-shadow-composition.html80/8080/8080/8080/8040/8040/80
box-shadow-interpolation.html402/402330/402402/402402/402251/402233/402
discrete-no-interpolation.html252/252252/252252/252252/252210/252210/252
two-background-color-animation-diff-length1.htmlPASSPASSPASSPASSTIMEOUTFAIL
two-background-color-animation-diff-length2.htmlPASSPASSPASSPASSTIMEOUTFAIL
two-background-color-animation-diff-length3.htmlPASSPASSPASSPASSTIMEOUTFAIL