diff --git a/layout/xul/test/window_resizer.xul b/layout/xul/test/window_resizer.xul
index 4e349d125ca3..1d21e0df07e1 100644
--- a/layout/xul/test/window_resizer.xul
+++ b/layout/xul/test/window_resizer.xul
@@ -81,7 +81,7 @@ function doTest() {
 
   // now check the cursors in rtl. The bottomend resizer
   // should be reversed
-  document.getElementById("bottomend").setAttribute("rtl", "true");
+  document.documentElement.setAttribute("localedir", "rtl");
   Array.forEach(resizers, function (element) {
     is(getComputedStyle(element, "").cursor,
        element.dir == "bottomend" ? "sw-resize" :
diff --git a/toolkit/content/widgets/resizer.xml b/toolkit/content/widgets/resizer.xml
index f28399c899ef..7faf77656956 100644
--- a/toolkit/content/widgets/resizer.xml
+++ b/toolkit/content/widgets/resizer.xml
@@ -11,29 +11,6 @@
     <resources>
       <stylesheet src="chrome://global/skin/resizer.css"/>
     </resources>
-    <implementation>
-      <constructor>
-      <![CDATA[
-        // don't do this for viewport resizers; causes a crash related to
-        // bugs 563665 and 581536 otherwise
-        if (this.parentNode == this.ownerDocument.documentElement)
-          return;
-
-        // if the direction is rtl, set the rtl attribute so that the
-        // stylesheet can use this to make the cursor appear properly
-        var cs = window.getComputedStyle(this);
-        if (cs.writingMode === undefined || cs.writingMode == "horizontal-tb") {
-          if (cs.direction == "rtl") {
-            this.setAttribute("rtl", "true");
-          }
-        } else if (cs.writingMode.endsWith("-rl")) {
-          // writing-modes 'vertical-rl' and 'sideways-rl' want rtl resizers,
-          // as they will appear at the bottom left of the element
-          this.setAttribute("rtl", "true");
-        }
-      ]]>
-      </constructor>
-    </implementation>
   </binding>
 
 </bindings>
diff --git a/toolkit/themes/osx/global/resizer.css b/toolkit/themes/osx/global/resizer.css
index 18cdd2bc9304..dd1fc419b442 100644
--- a/toolkit/themes/osx/global/resizer.css
+++ b/toolkit/themes/osx/global/resizer.css
@@ -25,13 +25,11 @@ resizer[type="window"] {
   display: none;
 }
 
-resizer[rtl="true"],
-resizer[dir="bottomend"]:-moz-locale-dir(rtl) {
+resizer:-moz-locale-dir(rtl) {
   background: url("chrome://global/skin/icons/resizer-rtl.png") no-repeat;
 }
 @media (min-resolution: 2dppx) {
-  resizer[rtl="true"],
-  resizer[dir="bottomend"]:-moz-locale-dir(rtl) {
+  resizer:-moz-locale-dir(rtl) {
     background-image: url("chrome://global/skin/icons/resizer-rtl@2x.png");
     background-size: 100% 100%;
   }
@@ -45,8 +43,8 @@ resizer[dir="bottomstart"] {
 }
 
 resizer[dir="bottomleft"],
-resizer[dir="bottomstart"]:not([rtl="true"]):not(:-moz-locale-dir(rtl)),
-resizer[dir="bottomend"][rtl="true"] {
+resizer[dir="bottomstart"]:not(:-moz-locale-dir(rtl)),
+resizer[dir="bottomend"]:-moz-locale-dir(rtl) {
   cursor: sw-resize;
 }
 
diff --git a/toolkit/themes/windows/global/resizer.css b/toolkit/themes/windows/global/resizer.css
index 8108d7e85ad3..c58f578aff6e 100644
--- a/toolkit/themes/windows/global/resizer.css
+++ b/toolkit/themes/windows/global/resizer.css
@@ -13,8 +13,7 @@ resizer {
   height: 15px;
 }
 
-resizer[rtl="true"],
-resizer[dir="bottomend"]:-moz-locale-dir(rtl) {
+resizer:-moz-locale-dir(rtl) {
   background: url("chrome://global/skin/icons/resizer-rtl.png") no-repeat;
 }
 
@@ -25,8 +24,8 @@ resizer[dir="bottomstart"] {
 }
 
 resizer[dir="bottomleft"],
-resizer[dir="bottomstart"]:not([rtl="true"]):not(:-moz-locale-dir(rtl)),
-resizer[dir="bottomend"][rtl="true"] {
+resizer[dir="bottomstart"]:not(:-moz-locale-dir(rtl)),
+resizer[dir="bottomend"]:-moz-locale-dir(rtl) {
   cursor: sw-resize;
 }