broparity report

Bro vs Chromium parity · Debian GNU/Linux 12 (bookworm) · AMD Ryzen 9 7950X3D 16-Core Processor · 2026-05-04T09:50:38.541Z
Bro renders 92.3% of measured layout properties identically to Chromium across 168 test cases on Debian GNU/Linux 12 (bookworm). Pixel output matches on 99.1% of pixels. Scroll for the per-case screenshots and diffs.
92.3%
Layout conformance
weighted rect + style + paint match, mean across categories
99.1%
Pixel match
1 − mean pixel mismatch ratio
168
Cases
13 categories
OSDebian GNU/Linux 12 (bookworm)
CPUAMD Ryzen 9 7950X3D 16-Core Processor (32 threads)
Architecturex64
Viewport800x600
CategoryCasesLayout matchPixel matchRect ΔStyle Δ
backgrounds 10 100.0% 100.0% 0 0
borders 10 100.0% 100.0% 0 0
boxmodel 10 96.0% 99.8% 0 2
display-types 12 91.8% 99.0% 9 1
flex 18 95.7% 99.5% 3 6
game-ui 15 88.3% 98.9% 84 138
grid 11 100.0% 100.0% 0 0
overflow 7 100.0% 99.9% 0 0
position 18 100.0% 100.0% 0 0
sizing 10 94.0% 99.9% 0 3
tables 29 66.5% 96.3% 81 274
text 8 67.1% 94.7% 10 10
transforms 10 100.0% 100.0% 0 0
CasebroChromiumDiffPixel mismatchLayout Δ
backgrounds/bg-attachment-local 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-color-basic 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-image-data-url 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-linear-gradient 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-multiple 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-position 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-radial-gradient 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-repeat-x 0.000%
0/86400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-size-contain 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
backgrounds/bg-size-cover 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
borders/border-different-sides 0.000%
0/99200 px		 rect: 0
style: 0
of 2 elems
borders/border-radius-elliptical 0.000%
0/89600 px		 rect: 0
style: 0
of 2 elems
borders/border-radius-individual 0.000%
0/89600 px		 rect: 0
style: 0
of 2 elems
borders/border-radius-uniform 0.000%
0/92800 px		 rect: 0
style: 0
of 2 elems
borders/border-solid-basic 0.000%
0/92800 px		 rect: 0
style: 0
of 2 elems
borders/border-styles 0.200%
128/64000 px		 rect: 0
style: 0
of 6 elems
borders/box-shadow-basic 0.000%
0/86400 px		 rect: 0
style: 0
of 2 elems
borders/box-shadow-inset 0.000%
0/86400 px		 rect: 0
style: 0
of 2 elems
borders/box-shadow-multiple 0.000%
0/86400 px		 rect: 0
style: 0
of 2 elems
borders/outline-basic 0.000%
0/86400 px		 rect: 0
style: 0
of 2 elems
boxmodel/asymmetric-padding-margin 0.000%
0/81600 px		 rect: 0
style: 0
of 2 elems
boxmodel/basic-block 1.371%
1108/80800 px		 rect: 0
style: 2
of 2 elems
boxmodel/box-sizing-border-box 0.738%
1205/163200 px		 rect: 0
style: 0
of 3 elems
boxmodel/box-sizing-border-percent-padding 0.000%
0/76800 px		 rect: 0
style: 0
of 3 elems
boxmodel/margin-auto-centering 0.000%
0/102400 px		 rect: 0
style: 0
of 3 elems
boxmodel/margin-collapse 0.031%
44/140800 px		 rect: 0
style: 0
of 3 elems
boxmodel/negative-margin 0.000%
0/118400 px		 rect: 0
style: 0
of 4 elems
boxmodel/nested-margin-collapse 0.000%
0/54400 px		 rect: 0
style: 0
of 4 elems
boxmodel/outline-vs-border-spacing 0.000%
0/112000 px		 rect: 0
style: 0
of 4 elems
boxmodel/padding-inheritance-not 0.000%
0/102400 px		 rect: 0
style: 0
of 3 elems
display-types/button-default-size 0.750%
174/23200 px		 rect: 0
style: 1
of 3 elems
display-types/display-none-zero-size 0.151%
111/73600 px		 rect: 0
style: 0
of 5 elems
display-types/img-aspect-ratio 0.000%
0/49600 px		 rect: 0
style: 0
of 3 elems
display-types/img-css-size 0.000%
0/73600 px		 rect: 0
style: 0
of 3 elems
display-types/img-explicit-size 0.000%
0/73600 px		 rect: 0
style: 0
of 3 elems
display-types/img-intrinsic-size 0.000%
0/81600 px		 rect: 0
style: 0
of 3 elems
display-types/inline-block-baseline 2.184%
1852/84800 px		 rect: 3
style: 0
of 5 elems
display-types/inline-block-basic 0.766%
539/70400 px		 rect: 0
style: 0
of 5 elems
display-types/inline-block-vertical-align-top 2.283%
1936/84800 px		 rect: 3
style: 0
of 5 elems
display-types/inline-vs-inline-block 4.247%
2446/57600 px		 rect: 3
style: 0
of 6 elems
display-types/input-text-default 1.672%
388/23200 px		 rect: 0
style: 0
of 3 elems
display-types/visibility-hidden-keeps-size 0.194%
205/105600 px		 rect: 0
style: 0
of 5 elems
flex/align-content-wrap 0.000%
0/246400 px		 rect: 0
style: 0
of 6 elems
flex/align-items-center 0.032%
54/166400 px		 rect: 0
style: 0
of 5 elems
flex/align-self 0.032%
54/166400 px		 rect: 0
style: 0
of 5 elems
flex/column-basic 0.017%
54/326400 px		 rect: 0
style: 0
of 5 elems
flex/flex-1-shorthand 0.000%
0/86400 px		 rect: 0
style: 0
of 5 elems
flex/flex-baseline-align 0.005%
9/166400 px		 rect: 0
style: 0
of 5 elems
flex/flex-basis 0.049%
42/86400 px		 rect: 0
style: 0
of 5 elems
flex/flex-grow 0.071%
61/86400 px		 rect: 0
style: 3
of 5 elems
flex/flex-margin-auto 0.000%
0/70400 px		 rect: 0
style: 0
of 5 elems
flex/flex-percent-children 0.000%
0/86400 px		 rect: 0
style: 0
of 4 elems
flex/flex-shrink 0.049%
42/86400 px		 rect: 0
style: 0
of 5 elems
flex/flex-wrap 0.052%
78/150400 px		 rect: 0
style: 0
of 9 elems
flex/gap 0.063%
54/86400 px		 rect: 0
style: 0
of 5 elems
flex/justify-content-spacebetween 0.063%
54/86400 px		 rect: 0
style: 0
of 5 elems
flex/min-content-shrink 9.188%
3087/33600 px		 rect: 3
style: 3
of 5 elems
flex/nested-flex 0.110%
271/246400 px		 rect: 0
style: 0
of 14 elems
flex/order-property 0.039%
34/86400 px		 rect: 0
style: 0
of 5 elems
flex/row-basic 0.063%
54/86400 px		 rect: 0
style: 0
of 5 elems
game-ui/achievement-popup 0.282%
1356/480000 px		 rect: 3
style: 5
of 18 elems
game-ui/character-stats-panel 0.313%
1502/480000 px		 rect: 44
style: 34
of 63 elems
game-ui/combat-toast-stack 0.033%
156/480000 px		 rect: 0
style: 0
of 27 elems
game-ui/crafting-interface 3.223%
15472/480000 px		 rect: 26
style: 2
of 59 elems
game-ui/dialog-modal 0.004%
21/480000 px		 rect: 0
style: 8
of 22 elems
game-ui/health-bar-stack 0.000%
0/480000 px		 rect: 0
style: 0
of 30 elems
game-ui/hud-overlay 0.009%
42/480000 px		 rect: 0
style: 2
of 37 elems
game-ui/inventory-grid 0.000%
0/480000 px		 rect: 0
style: 0
of 80 elems
game-ui/leaderboard-rows 0.005%
24/480000 px		 rect: 0
style: 0
of 64 elems
game-ui/main-menu 12.232%
58716/480000 px		 rect: 0
style: 0
of 16 elems
game-ui/map-overlay-with-pins 0.341%
1636/480000 px		 rect: 11
style: 5
of 27 elems
game-ui/pause-menu-overlay 0.057%
275/480000 px		 rect: 0
style: 0
of 15 elems
game-ui/scoreboard-end-of-match 0.004%
19/480000 px		 rect: 0
style: 82
of 103 elems
game-ui/skill-tree 0.000%
0/480000 px		 rect: 0
style: 0
of 66 elems
game-ui/vendor-shop-grid 0.000%
0/480000 px		 rect: 0
style: 0
of 65 elems
grid/grid-area-spans 0.000%
0/134400 px		 rect: 0
style: 0
of 5 elems
grid/grid-auto-flow 0.000%
0/105600 px		 rect: 0
style: 0
of 7 elems
grid/grid-auto-rows 0.000%
0/118400 px		 rect: 0
style: 0
of 6 elems
grid/grid-basic 0.000%
0/86400 px		 rect: 0
style: 0
of 5 elems
grid/grid-fr-units 0.000%
0/86400 px		 rect: 0
style: 0
of 5 elems
grid/grid-gap 0.000%
0/144000 px		 rect: 0
style: 0
of 6 elems
grid/grid-justify-align 0.000%
0/166400 px		 rect: 0
style: 0
of 6 elems
grid/grid-minmax 0.000%
0/86400 px		 rect: 0
style: 0
of 5 elems
grid/grid-named-areas 0.000%
0/158400 px		 rect: 0
style: 0
of 6 elems
grid/grid-nested 0.000%
0/166400 px		 rect: 0
style: 0
of 8 elems
grid/grid-rows 0.000%
0/134400 px		 rect: 0
style: 0
of 6 elems
overflow/clip-path-basic 0.000%
0/166400 px		 rect: 0
style: 0
of 2 elems
overflow/overflow-auto-scroll 0.065%
160/246400 px		 rect: 0
style: 0
of 3 elems
overflow/overflow-hidden 0.000%
0/126400 px		 rect: 0
style: 0
of 3 elems
overflow/overflow-visible 0.000%
0/126400 px		 rect: 0
style: 0
of 3 elems
overflow/overflow-with-border-radius 0.000%
0/86400 px		 rect: 0
style: 0
of 3 elems
overflow/overflow-x-y-different 0.000%
0/166400 px		 rect: 0
style: 0
of 3 elems
overflow/text-overflow-ellipsis 0.827%
278/33600 px		 rect: 0
style: 0
of 2 elems
position/absolute-in-relative 0.015%
38/246400 px		 rect: 0
style: 0
of 3 elems
position/absolute-in-transform 0.000%
0/246400 px		 rect: 0
style: 0
of 3 elems
position/absolute-no-ancestor 0.068%
182/266400 px		 rect: 0
style: 0
of 3 elems
position/absolute-percent 0.024%
59/246400 px		 rect: 0
style: 0
of 3 elems
position/absolute-tlbr 0.005%
15/326400 px		 rect: 0
style: 0
of 3 elems
position/abspos-percent-padding 0.000%
0/278400 px		 rect: 0
style: 0
of 3 elems
position/fixed-position 0.015%
31/203200 px		 rect: 0
style: 0
of 3 elems
position/fixed-with-content 0.000%
0/163200 px		 rect: 0
style: 0
of 3 elems
position/inset-shorthand 0.026%
86/326400 px		 rect: 0
style: 0
of 3 elems
position/multiple-stacking-contexts 0.000%
0/246400 px		 rect: 0
style: 0
of 6 elems
position/negative-zindex 0.000%
0/326400 px		 rect: 0
style: 0
of 4 elems
position/position-grid-cell 0.000%
0/166400 px		 rect: 0
style: 0
of 5 elems
position/relative-offset 0.070%
155/222400 px		 rect: 0
style: 0
of 3 elems
position/stacking-context-opacity 0.000%
0/326400 px		 rect: 0
style: 0
of 5 elems
position/sticky-basic 0.030%
135/443200 px		 rect: 0
style: 0
of 4 elems
position/sticky-in-flex 0.000%
0/70400 px		 rect: 0
style: 0
of 5 elems
position/transform-stacking-context 0.000%
0/326400 px		 rect: 0
style: 0
of 5 elems
position/z-index-stacking 0.000%
0/326400 px		 rect: 0
style: 0
of 5 elems
sizing/aspect-ratio 0.000%
0/153600 px		 rect: 0
style: 0
of 2 elems
sizing/box-sizing-content-box 0.000%
0/124800 px		 rect: 0
style: 0
of 2 elems
sizing/height-vh-vw 0.000%
0/153600 px		 rect: 0
style: 0
of 2 elems
sizing/min-max-width-clamp 0.000%
0/76800 px		 rect: 0
style: 0
of 4 elems
sizing/padding-percent 0.000%
0/70400 px		 rect: 0
style: 0
of 3 elems
sizing/width-calc 0.000%
0/86400 px		 rect: 0
style: 0
of 3 elems
sizing/width-fit-content 0.057%
21/36800 px		 rect: 0
style: 1
of 2 elems
sizing/width-max-content 0.573%
211/36800 px		 rect: 0
style: 1
of 2 elems
sizing/width-min-content 0.082%
30/36800 px		 rect: 0
style: 1
of 2 elems
sizing/width-percent 0.000%
0/54400 px		 rect: 0
style: 0
of 3 elems
tables/basic 0.207%
149/72000 px		 rect: 0
style: 10
of 11 elems
tables/border-collapse 2.881%
2812/97600 px		 rect: 0
style: 14
of 15 elems
tables/border-collapse-double 5.385%
6290/116800 px		 rect: 0
style: 14
of 15 elems
tables/border-collapse-mixed-widths 6.369%
7847/123200 px		 rect: 6
style: 14
of 15 elems
tables/border-separate 0.166%
149/89600 px		 rect: 0
style: 10
of 11 elems
tables/border-spacing 0.604%
638/105600 px		 rect: 0
style: 14
of 15 elems
tables/caption 1.992%
1769/88800 px		 rect: 5
style: 11
of 12 elems
tables/caption-side-bottom 2.119%
1882/88800 px		 rect: 0
style: 11
of 12 elems
tables/colgroup-col-widths 3.491%
3240/92800 px		 rect: 0
style: 0
of 19 elems
tables/colspan 2.221%
1599/72000 px		 rect: 9
style: 9
of 10 elems
tables/colspan-rowspan-mixed 16.019%
48184/300800 px		 rect: 9
style: 3
of 23 elems
tables/empty-cells-show 0.679%
1716/252800 px		 rect: 0
style: 0
of 23 elems
tables/nested-table 3.239%
2954/91200 px		 rect: 18
style: 18
of 19 elems
tables/nth-child-row-striping 1.765%
3120/176800 px		 rect: 0
style: 26
of 27 elems
tables/rowspan 5.033%
5154/102400 px		 rect: 3
style: 13
of 14 elems
tables/table-bg-layers 1.329%
1531/115200 px		 rect: 0
style: 14
of 15 elems
tables/table-layout-auto 7.102%
6591/92800 px		 rect: 11
style: 14
of 15 elems
tables/table-layout-fixed 6.571%
4258/64800 px		 rect: 0
style: 0
of 15 elems
tables/table-margin-auto 3.715%
2407/64800 px		 rect: 0
style: 4
of 9 elems
tables/table-width-100-percent 3.774%
3532/93600 px		 rect: 0
style: 6
of 12 elems
tables/table-width-min-content 3.046%
1974/64800 px		 rect: 6
style: 10
of 11 elems
tables/tbody-multiple 2.003%
2981/148800 px		 rect: 14
style: 24
of 25 elems
tables/td-padding-percent 3.069%
3560/116000 px		 rect: 0
style: 11
of 11 elems
tables/td-text-align 3.816%
3541/92800 px		 rect: 0
style: 0
of 15 elems
tables/td-vertical-align 2.609%
3005/115200 px		 rect: 0
style: 0
of 7 elems
tables/td-width-explicit 4.974%
3223/64800 px		 rect: 0
style: 0
of 11 elems
tables/td-width-percent 5.028%
3258/64800 px		 rect: 0
style: 0
of 11 elems
tables/thead-tfoot 1.985%
2954/148800 px		 rect: 0
style: 24
of 25 elems
tables/wrapping-text-cells 6.634%
5307/80000 px		 rect: 0
style: 0
of 7 elems
text/font-shorthand 7.800%
4181/53600 px		 rect: 0
style: 2
of 2 elems
text/font-size-cascade 1.765%
1553/88000 px		 rect: 0
style: 0
of 4 elems
text/inline-formatting 6.936%
3773/54400 px		 rect: 6
style: 2
of 6 elems
text/line-height-px 3.879%
4717/121600 px		 rect: 2
style: 0
of 5 elems
text/line-height-unitless 3.924%
4772/121600 px		 rect: 2
style: 0
of 5 elems
text/text-wrap-soft 6.340%
9535/150400 px		 rect: 0
style: 2
of 2 elems
text/whitespace-normal 8.245%
3496/42400 px		 rect: 0
style: 2
of 2 elems
text/whitespace-pre 3.301%
2799/84800 px		 rect: 0
style: 2
of 2 elems
transforms/matrix 0.000%
0/246400 px		 rect: 0
style: 0
of 3 elems
transforms/rotate-deg 0.000%
0/246400 px		 rect: 0
style: 0
of 3 elems
transforms/scale-axis 0.000%
0/166400 px		 rect: 0
style: 0
of 3 elems
transforms/scale-uniform 0.000%
0/246400 px		 rect: 0
style: 0
of 3 elems
transforms/transform-3d-rotateX 0.000%
0/246400 px		 rect: 0
style: 0
of 3 elems
transforms/transform-multiple 0.000%
0/246400 px		 rect: 0
style: 0
of 3 elems
transforms/transform-origin 0.000%
0/246400 px		 rect: 0
style: 0
of 3 elems
transforms/translate-percent 0.000%
0/166400 px		 rect: 0
style: 0
of 3 elems
transforms/translate-px 0.000%
0/166400 px		 rect: 0
style: 0
of 3 elems
transforms/translate-shorthand-x-y 0.000%
0/166400 px		 rect: 0
style: 0
of 3 elems