--- a/browser/tools/mozscreenshots/mozscreenshots/extension/TestRunner.jsm
+++ b/browser/tools/mozscreenshots/mozscreenshots/extension/TestRunner.jsm
@@ -296,16 +296,17 @@ this.TestRunner = {
   },
 
   _comboName(combo) {
     return combo.reduce(function(a, b) {
       return a + "_" + b.name;
     }, "");
   },
 
+  // random change
   async _cropImage(window, srcPath, rect, targetPath) {
     const { document, Image } = window;
     const promise = new Promise((resolve, reject) => {
       const img = new Image();
       img.onload = function() {
         // Make sure that the cropping region is valid and that the cropping
         // region is inside the screenshot we are cropping
         if (rect.x < 0 || rect.y < 0 || rect.width < 0 || rect.height < 0 ||