diff --git a/ci/release/changelogs/next.md b/ci/release/changelogs/next.md
index c8eb0dc2a..ea756902b 100644
--- a/ci/release/changelogs/next.md
+++ b/ci/release/changelogs/next.md
@@ -41,3 +41,4 @@
 - Sequence diagram note ordering was sometimes wrong. [#796](https://github.com/terrastruct/d2/pull/796)
 - Images can now be set to sizes smaller than 128x128. [#702](https://github.com/terrastruct/d2/pull/702)
 - Fixes class height when there are no rows. [#756](https://github.com/terrastruct/d2/pull/756)
+- Border radius was not firefox-compatible. [#799](https://github.com/terrastruct/d2/pull/799)
diff --git a/e2etests/stable_test.go b/e2etests/stable_test.go
index 99322c205..bca51d2e7 100644
--- a/e2etests/stable_test.go
+++ b/e2etests/stable_test.go
@@ -2013,6 +2013,18 @@ x: {
 y: {
 	style.border-radius: 10
 }
+multiple2: {
+	style.border-radius: 6
+	style.multiple: true
+}
+double: {
+	style.border-radius: 6
+	style.double-border: true
+}
+three-dee: {
+	style.border-radius: 6
+	style.3d: true
+}
 `,
 		},
 		{
diff --git a/e2etests/testdata/stable/border-radius/dagre/board.exp.json b/e2etests/testdata/stable/border-radius/dagre/board.exp.json
index 01c354ee8..c29f14165 100644
--- a/e2etests/testdata/stable/border-radius/dagre/board.exp.json
+++ b/e2etests/testdata/stable/border-radius/dagre/board.exp.json
@@ -83,6 +83,129 @@
       "labelPosition": "INSIDE_MIDDLE_CENTER",
       "zIndex": 0,
       "level": 1
+    },
+    {
+      "id": "multiple2",
+      "type": "rectangle",
+      "pos": {
+        "x": 227,
+        "y": 0
+      },
+      "width": 112,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 6,
+      "fill": "#F7F8FE",
+      "stroke": "#0D32B2",
+      "shadow": false,
+      "3d": false,
+      "multiple": true,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "multiple2",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "#0A0F25",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 67,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "double",
+      "type": "rectangle",
+      "pos": {
+        "x": 399,
+        "y": 0
+      },
+      "width": 94,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 6,
+      "fill": "#F7F8FE",
+      "stroke": "#0D32B2",
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": true,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "double",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "#0A0F25",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 49,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "three-dee",
+      "type": "rectangle",
+      "pos": {
+        "x": 553,
+        "y": 0
+      },
+      "width": 114,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 6,
+      "fill": "#F7F8FE",
+      "stroke": "#0D32B2",
+      "shadow": false,
+      "3d": true,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "three-dee",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "#0A0F25",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 69,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
     }
   ],
   "connections": []
diff --git a/e2etests/testdata/stable/border-radius/dagre/sketch.exp.svg b/e2etests/testdata/stable/border-radius/dagre/sketch.exp.svg
index fce49f8cb..24313ab08 100644
--- a/e2etests/testdata/stable/border-radius/dagre/sketch.exp.svg
+++ b/e2etests/testdata/stable/border-radius/dagre/sketch.exp.svg
@@ -3,7 +3,7 @@
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 xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-width="371" height="270" viewBox="-102 -102 371 270"><style type="text/css">
+width="886" height="285" viewBox="-102 -117 886 285"><style type="text/css">
 <![CDATA[
 .shape {
   shape-rendering: geometricPrecision;
@@ -39,8 +39,10 @@ width="371" height="270" viewBox="-102 -102 371 270"><style type="text/css">
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+<path d="M553,0L568,-15L682,-15L682,51L667,66L553,66L553,0L667,0L667,66M667,0L682,-15" style="fill:none;stroke:#0D32B2;stroke-width:2;;stroke:#000;fill:none;opacity:1;"/></mask></defs><rect x="553" y="0" width="114" height="66" style="fill:#F7F8FE;stroke:none;stroke-width:2;" mask="url(#border-mask-three-dee)"/><polygon points="553,0 568,-15 682,-15 682,51 667,66 667,0" style="fill:#cad0f8;stroke:none;stroke-width:2;" mask="url(#border-mask-three-dee)"/><path d="M553,0 L568,-15 L682,-15 L682,51 L667,66 L553,66 L553,0 L667,0 L667,66 M667,0 L682,-15" style="fill:none;stroke:#0D32B2;stroke-width:2;"/></g><text class="text-bold" x="610.000000" y="38.500000" style="text-anchor:middle;font-size:16px;fill:#0A0F25">three-dee</text></g><mask id="993173208" maskUnits="userSpaceOnUse" x="-100" y="-100" width="886" height="285">
+<rect x="-100" y="-100" width="886" height="285" fill="white"></rect>
 
 </mask><style type="text/css"><![CDATA[
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diff --git a/e2etests/testdata/stable/border-radius/elk/board.exp.json b/e2etests/testdata/stable/border-radius/elk/board.exp.json
index 21f836835..a6c31b298 100644
--- a/e2etests/testdata/stable/border-radius/elk/board.exp.json
+++ b/e2etests/testdata/stable/border-radius/elk/board.exp.json
@@ -83,6 +83,129 @@
       "labelPosition": "INSIDE_MIDDLE_CENTER",
       "zIndex": 0,
       "level": 1
+    },
+    {
+      "id": "multiple2",
+      "type": "rectangle",
+      "pos": {
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+        "y": 12
+      },
+      "width": 112,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 6,
+      "fill": "#F7F8FE",
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+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
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+      "color": "#0A0F25",
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+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
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+      "type": "rectangle",
+      "pos": {
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+        "y": 12
+      },
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+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 6,
+      "fill": "#F7F8FE",
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+      "multiple": false,
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+      "height": 66,
+      "opacity": 1,
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+      "borderRadius": 6,
+      "fill": "#F7F8FE",
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+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
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+      "methods": null,
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+      "level": 1
     }
   ],
   "connections": []
diff --git a/e2etests/testdata/stable/border-radius/elk/sketch.exp.svg b/e2etests/testdata/stable/border-radius/elk/sketch.exp.svg
index 917b15260..d734f5c91 100644
--- a/e2etests/testdata/stable/border-radius/elk/sketch.exp.svg
+++ b/e2etests/testdata/stable/border-radius/elk/sketch.exp.svg
@@ -3,7 +3,7 @@
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   shape-rendering: geometricPrecision;
@@ -39,8 +39,10 @@ width="331" height="270" viewBox="-90 -90 331 270"><style type="text/css">
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