diff --git a/web/text_layer_builder.js b/web/text_layer_builder.js
index c8b6e6b5a..0a03a428a 100644
--- a/web/text_layer_builder.js
+++ b/web/text_layer_builder.js
@@ -28,6 +28,8 @@
   }
 }(this, function (exports, domEvents, pdfjsLib) {
 
+var EXPAND_DIVS_TIMEOUT = 300; // ms
+
 /**
  * @typedef {Object} TextLayerBuilderOptions
  * @property {HTMLDivElement} textLayerDiv - The text layer container.
@@ -321,9 +323,16 @@ var TextLayerBuilder = (function TextLayerBuilderClosure() {
     _bindMouse: function TextLayerBuilder_bindMouse() {
       var div = this.textLayerDiv;
       var self = this;
+      var expandDivsTimer = null;
       div.addEventListener('mousedown', function (e) {
         if (self.enhanceTextSelection && self.textLayerRenderTask) {
           self.textLayerRenderTask.expandTextDivs(true);
+//#if !(MOZCENTRAL || FIREFOX)
+          if (expandDivsTimer) {
+            clearTimeout(expandDivsTimer);
+            expandDivsTimer = null;
+          }
+//#endif
           return;
         }
         var end = div.querySelector('.endOfContent');
@@ -350,7 +359,14 @@ var TextLayerBuilder = (function TextLayerBuilderClosure() {
       });
       div.addEventListener('mouseup', function (e) {
         if (self.enhanceTextSelection && self.textLayerRenderTask) {
-          self.textLayerRenderTask.expandTextDivs(false);
+//#if !(MOZCENTRAL || FIREFOX)
+          expandDivsTimer = setTimeout(function() {
+            self.textLayerRenderTask.expandTextDivs(false);
+            expandDivsTimer = null;
+          }, EXPAND_DIVS_TIMEOUT);
+//#else
+//        self.textLayerRenderTask.expandTextDivs(false);
+//#endif
           return;
         }
         var end = div.querySelector('.endOfContent');