Avoid double manipulation on the selection because of Firefox bug.

core/selection.js

@@ -206,9 +206,17 @@
 					evt.removeListener();
 
 					if ( restoreSel !== 0 ) {
-						var rng = editor.createRange();
-						rng.moveToElementEditStart( editable );
-						rng.select();
+						var native = editor.getSelection().getNative();
+						// Do it only if the native selection is at an unwanted
+						// place (at the very start of the editable). #10119
+						// IEs<9 won't enter this if (no isCollapsed property on selection instance),
+						// but this is acceptable since they do a good job in terms of
+						// default selection positioning.
+						if ( native.isCollapsed && native.anchorNode == editable.$ ) {
+							var rng = editor.createRange();
+							rng.moveToElementEditStart( editable );
+							rng.select();
+						}
 					}
 				}, null, null, -2 );
 			}

plugins/elementspath/plugin.js

@@ -88,14 +88,17 @@
 
 
 			function onClick( elementIndex ) {
-				editor.focus();
 				var element = editor._.elementsPath.list[ elementIndex ];
 				if ( element.equals( editor.editable() ) ) {
 					var range = editor.createRange();
 					range.selectNodeContents( element );
 					range.select();
 				} else
 					editor.getSelection().selectElement( element );
+
+				// It is important to focus() *after* the above selection
+				// manipulation, otherwise Firefox will have troubles. #10119
+				editor.focus();
 			}
 
 			var onClickHanlder = CKEDITOR.tools.addFunction( onClick );