diff --git a/gfx/tests/crashtests/1762973-1.html b/gfx/tests/crashtests/1762973-1.html
new file mode 100644
index 000000000000..6f8935211d0e
--- /dev/null
+++ b/gfx/tests/crashtests/1762973-1.html
@@ -0,0 +1,29 @@
+<style>
+* { clip-path: polygon(0px 0px, 1px 61px, 1px 0px); }
+</style>
+<script>
+window.requestIdleCallback(() => {
+  document.documentElement.style.display='none'
+  document.documentElement.getBoundingClientRect()
+  document.documentElement.style.display=''
+  setTimeout(() => { window.location.reload(true) }, 500) // helps reproduction
+})
+function go() {
+    var x = document.defaultView.getSelection()
+    window.stop()
+    x.collapse(d)
+    document.execCommand("removeFormat", false)
+    x.collapse(a)
+}
+function eh() {
+    d.setAttributeNode(document.createAttribute("contenteditable"))
+    c.src = "data:audio/mpeg;base64,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"
+    b.appendChild(a)
+}
+</script>
+<body onload=go()>
+<dialog id="a" open="true"></dialog>
+<details id="b" style="writing-mode: vertical-rl" open="true" ontoggle="eh()">
+<summary style="position: fixed"></summary>
+<embed id="c"></embed>
+<ol id="d"></ol>
diff --git a/gfx/tests/crashtests/crashtests.list b/gfx/tests/crashtests/crashtests.list
index 70b60055f939..e675466ddb1d 100644
--- a/gfx/tests/crashtests/crashtests.list
+++ b/gfx/tests/crashtests/crashtests.list
@@ -211,3 +211,4 @@ load 1730695.html
 load 1745775.html
 load 1757002.html
 load 1758127-1.html
+load 1762973-1.html
diff --git a/gfx/wr/swgl/src/composite.h b/gfx/wr/swgl/src/composite.h
index 55d36609db71..4caf80446b4e 100644
--- a/gfx/wr/swgl/src/composite.h
+++ b/gfx/wr/swgl/src/composite.h
@@ -435,6 +435,10 @@ void Composite(LockedTexture* lockedDst, LockedTexture* lockedSrc, GLint srcX,
       IntRect{srcX, srcY, srcX + srcWidth, srcY + srcHeight} - srctex.offset;
   IntRect dstReq =
       IntRect{dstX, dstY, dstX + dstWidth, dstY + dstHeight} - dsttex.offset;
+  if (srcReq.is_empty() || dstReq.is_empty()) {
+    return;
+  }
+
   // Compute clip rect as relative to the dstReq, as that's the same coords
   // as used for the sampling bounds.
   IntRect clipRect = {clipX - dstX, clipY - dstY, clipX - dstX + clipWidth,
@@ -1230,6 +1234,10 @@ void CompositeYUV(LockedTexture* lockedDst, LockedTexture* lockedY,
       IntRect{srcX, srcY, srcX + srcWidth, srcY + srcHeight} - ytex.offset;
   IntRect dstReq =
       IntRect{dstX, dstY, dstX + dstWidth, dstY + dstHeight} - dsttex.offset;
+  if (srcReq.is_empty() || dstReq.is_empty()) {
+    return;
+  }
+
   // Compute clip rect as relative to the dstReq, as that's the same coords
   // as used for the sampling bounds.
   IntRect clipRect = {clipX - dstX, clipY - dstY, clipX - dstX + clipWidth,
