diff --git a/core/field_image.js b/core/field_image.js
index 71d8052f9..1af5d9ea1 100644
--- a/core/field_image.js
+++ b/core/field_image.js
@@ -84,17 +84,6 @@ Blockly.FieldImage.prototype.init = function() {
       {'height': this.height_ + 'px',
        'width': this.width_ + 'px'}, this.fieldGroup_);
   this.setValue(this.src_);
-  if (goog.userAgent.GECKO) {
-    /**
-     * Due to a Firefox bug which eats mouse events on image elements,
-     * a transparent rectangle needs to be placed on top of the image.
-     * @type {SVGElement}
-     */
-    this.rectElement_ = Blockly.createSvgElement('rect',
-        {'height': this.height_ + 'px',
-         'width': this.width_ + 'px',
-         'fill-opacity': 0}, this.fieldGroup_);
-  }
   this.sourceBlock_.getSvgRoot().appendChild(this.fieldGroup_);
 
   // Configure the field to be transparent with respect to tooltips.