diff --git a/src/octoprint/plugins/svgtogcode/static/js/working_area.js b/src/octoprint/plugins/svgtogcode/static/js/working_area.js
index 8c320b95..032b1897 100644
--- a/src/octoprint/plugins/svgtogcode/static/js/working_area.js
+++ b/src/octoprint/plugins/svgtogcode/static/js/working_area.js
@@ -132,14 +132,9 @@ $(function(){
 		};
 
 		self.getXYCoord = function(evt){
-			if(isFirefox) {
-				var scale = evt.target.parentElement.transform.baseVal[0].matrix.a;
-				var x = self.px2mm(evt.offsetX) * scale;
-				var y = self.px2mm(parseFloat(evt.target.attributes.height.value) - evt.offsetY) * scale;
-			} else {
-				var x = self.px2mm(evt.offsetX);
-				var y = self.px2mm(evt.target.ownerSVGElement.getBoundingClientRect().height - evt.offsetY); // hopefully this works across browsers
-			}
+			var scale = evt.target.parentElement.transform.baseVal[0].matrix.a;
+			var x = self.px2mm(evt.offsetX) * scale;
+			var y = self.px2mm(parseFloat(evt.target.attributes.height.value) - evt.offsetY) * scale;
 			x = Math.min(x, self.workingAreaWidthMM());
 			y = Math.min(y, self.workingAreaHeightMM());
 			return {x:x, y:y};