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+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <title>Test for SVG tabIndex - Bug 778654</title>
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+</head>
+<body>
+<svg xmlns="http://www.w3.org/2000/svg" overflow="visible">
+  <foreignObject id="f" x="0" y="0" width="200" height="60" tabindex="0">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <p>Here is a paragraph that requires word wrap</p>
+    </body>
+  </foreignObject>
+  <rect id="r" x="0" y="70" width="100" height="100" fill="yellow" tabindex="1"/>
+  <text id="t" x="0" y="200" tabindex="2">
+    This is SVG text
+  </text>
+  <a xlink:href="#" id="l1" tabindex="3">
+    <circle cx="10" cy="230" r="10"/>
+  </a>
+  <a id="l2" tabindex="4">
+    <circle cx="10" cy="260" r="10"/>
+  </a>
+  <rect id="r6" x="0" y="70" width="100" height="100" fill="yellow" tabindex="6"/>
+  <rect id="r7" x="0" y="70" width="100" height="100" fill="yellow" tabindex="7"/>
+</svg>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+
+function main() {
+  var f = document.getElementById("f");
+  var r = document.getElementById("r");
+  var t = document.getElementById("t");
+  var l1 = document.getElementById("l1");
+  var l2 = document.getElementById("l2");
+  const isMac = ("nsILocalFileMac" in SpecialPowers.Ci);
+
+  try {
+    // Step 1: Checking by assigning tabIndex
+    is(f.tabIndex, 0, "foreignObject initial tabIndex");
+    f.tabIndex = 1;
+    is(f.tabIndex, 1, "foreignObject tabIndex is set to 1");
+
+    is(r.tabIndex, 1, "rect initial tabIndex");
+    r.tabIndex = 2;
+    is(r.tabIndex, 2, "rect tabIndex is set to 2");
+
+    is(t.tabIndex, 2, "text initial tabIndex");
+    t.tabIndex = 3;
+    is(t.tabIndex, 3, "text is set to 3");
+
+    is(l1.tabIndex, 3, "link initial tabIndex");
+    l1.tabIndex = 4;
+    is(l1.tabIndex, 4, "link is set to 4");
+
+    is(l2.tabIndex, 4, "non-link initial tabIndex");
+    l2.tabIndex = 5;
+    is(l2.tabIndex, 5, "non-link is set to 4");
+
+    // Step 2: Checking by triggering TAB event
+    is(document.activeElement.tabIndex, -1, "In the beginning, the active element tabindex is -1");
+
+    synthesizeKey("KEY_Tab");
+    is(document.activeElement.tabIndex, 1, "The active element tabindex is 1");
+
+    synthesizeKey("KEY_Tab");
+    is(document.activeElement.tabIndex, 2, "The active element tabindex is 2");
+
+    synthesizeKey("KEY_Tab");
+    is(document.activeElement.tabIndex, 3, "The active element tabindex is 3");
+
+    synthesizeKey("KEY_Tab");
+    // On Mac, SVG link elements should not be focused.
+    if (isMac) {
+      is(document.activeElement.tabIndex, 6, "The active element tabindex is 6");
+    } else {
+      is(document.activeElement.tabIndex, 4, "The active element tabindex is 4");
+    }
+
+    synthesizeKey("KEY_Tab");
+    // On Mac, SVG link elements should not be focused.
+    if (isMac) {
+      is(document.activeElement.tabIndex, 7, "The active element tabindex is 7");
+    } else {
+      is(document.activeElement.tabIndex, 5, "The active element tabindex is 5");
+    }
+  } catch (e) {
+    ok(false, "Got unexpected exception" + e);
+  }
+
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForFocus(main);
+
+</script>
+</pre>
+</body>
+</html>