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<!DOCTYPE html>
<!-- This test relies on caret browsing being enabled. -->
<html class="reftest-wait">
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
.parent {
font: 32px monospace;
width: 26ch;
overflow: hidden;
#child {
transform: scaleX(0.5);
transform-origin: 0 0;
outline: none;
<div class="parent"><div id="child">.BCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz</div></div>
SimpleTest.waitForFocus(function() {
let r = document.createRange();
let t = child.firstChild;
// With a scale of 0.5, the bug manifests by limiting the caret's position
// to half way through the text. Place the selection somewhere past that.
r.setStart(t, 30);
r.setEnd(t, 30);
let sel = getSelection();