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+<!doctype html>
+<meta charset="utf-8">
+<title>
+  Test for bug 1376352: We don't reframe all the time a replaced element that
+  matches generated content rules.
+</title>
+<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<style>
+#flex::before,
+input::before {
+  content: "Foo";
+}
+</style>
+<input type="text">
+<div id="flex"></div>
+<script>
+SimpleTest.waitForExplicitFinish();
+const utils = SpecialPowers.getDOMWindowUtils(window);
+
+function testNoReframe(callback) {
+  document.documentElement.offsetTop;
+  const previousConstructCount = utils.framesConstructed;
+  const previousRestyleGeneration = utils.restyleGeneration;
+
+  callback();
+
+  document.documentElement.offsetTop;
+  isnot(previousRestyleGeneration, utils.restyleGeneration,
+        "We should have restyled");
+  is(previousConstructCount, utils.framesConstructed,
+     "We shouldn't have reframed");
+}
+
+testNoReframe(function() {
+  const input = document.querySelector('input');
+  input.style.color = "blue";
+});
+
+testNoReframe(function() {
+  const flex = document.getElementById('flex');
+  flex.style.color = "blue";
+});
+
+SimpleTest.finish();
+</script>