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diff --git a/editor/libeditor/tests/test_cut_copy_password.html b/editor/libeditor/tests/test_cut_copy_password.html
new file mode 100644
index 0000000000..4e0319d68c
--- /dev/null
+++ b/editor/libeditor/tests/test_cut_copy_password.html
@@ -0,0 +1,92 @@
+<!doctype html>
+<html>
+<head>
+  <title>Test for cut/copy in password field</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <input type="password">
+<script>
+SimpleTest.waitForExplicitFinish();
+SimpleTest.waitForFocus(async () => {
+  let input = document.getElementsByTagName("input")[0];
+  let editor = SpecialPowers.wrap(input).editor;
+  const kMask = editor.passwordMask;
+  async function copyToClipboard(aExpectedValue) {
+    try {
+      await SimpleTest.promiseClipboardChange(
+          aExpectedValue, () => { SpecialPowers.doCommand(window, "cmd_copy"); },
+          undefined, undefined, aExpectedValue === null);
+    } catch (e) {
+      console.error(e);
+    }
+  }
+  async function cutToClipboard(aExpectedValue) {
+    try {
+      await SimpleTest.promiseClipboardChange(
+          aExpectedValue, () => { SpecialPowers.doCommand(window, "cmd_cut"); },
+          undefined, undefined, aExpectedValue === null);
+    } catch (e) {
+      console.error(e);
+    }
+  }
+  input.value = "abcdef";
+  input.focus();
+
+  input.setSelectionRange(0, 6);
+  ok(true, "Trying to copy masked password...");
+  await copyToClipboard(null);
+  isnot(SpecialPowers.getClipboardData("text/plain"), "abcdef",
+        "Copying masked password shouldn't copy raw value into the clipboard");
+  isnot(SpecialPowers.getClipboardData("text/plain"), `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+        "Copying masked password shouldn't copy masked value into the clipboard");
+  ok(true, "Trying to cut masked password...");
+  await cutToClipboard(null);
+  isnot(SpecialPowers.getClipboardData("text/plain"), "abcdef",
+        "Cutting masked password shouldn't copy raw value into the clipboard");
+  isnot(SpecialPowers.getClipboardData("text/plain"), `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+        "Cutting masked password shouldn't copy masked value into the clipboard");
+  is(input.value, "abcdef",
+     "Cutting masked password shouldn't modify the value");
+
+  editor.unmask(2, 4);
+  input.setSelectionRange(0, 6);
+  ok(true, "Trying to copy partially masked password...");
+  await copyToClipboard(null);
+  isnot(SpecialPowers.getClipboardData("text/plain"), "abcdef",
+        "Copying partially masked password shouldn't copy raw value into the clipboard");
+  isnot(SpecialPowers.getClipboardData("text/plain"), `${kMask}${kMask}cd${kMask}${kMask}`,
+        "Copying partially masked password shouldn't copy partially masked value into the clipboard");
+  isnot(SpecialPowers.getClipboardData("text/plain"), `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+        "Copying partially masked password shouldn't copy masked value into the clipboard");
+  ok(true, "Trying to cut partially masked password...");
+  await cutToClipboard(null);
+  isnot(SpecialPowers.getClipboardData("text/plain"), "abcdef",
+        "Cutting partially masked password shouldn't copy raw value into the clipboard");
+  isnot(SpecialPowers.getClipboardData("text/plain"), `${kMask}${kMask}cd${kMask}${kMask}`,
+        "Cutting partially masked password shouldn't copy partially masked value into the clipboard");
+  isnot(SpecialPowers.getClipboardData("text/plain"), `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+        "Cutting partially masked password shouldn't copy masked value into the clipboard");
+  is(input.value, "abcdef",
+     "Cutting partially masked password shouldn't modify the value");
+
+  input.setSelectionRange(2, 4);
+  ok(true, "Trying to copy unmasked password...");
+  await copyToClipboard("cd");
+  is(input.value, "abcdef",
+     "Copying unmasked password shouldn't modify the value");
+
+  input.value = "012345";
+  editor.unmask(2, 4);
+  input.setSelectionRange(2, 4);
+  ok(true, "Trying to cut unmasked password...");
+  await cutToClipboard("23");
+  is(input.value, "0145",
+     "Cutting unmasked password should modify the value");
+
+  SimpleTest.finish();
+});
+</script>
+</body>
+</html>