Strange problem with Web Clipper alpha-25, FF 33.0.1 and page https://clinthuijbers.wordpress.com/2013/09/06/ssis-powershell-script-task/. Having clicked on Web clipper icon, clipper selected article but I was not able to scroll down with mouse wheel to check selection. This behaviour is specific to this page, on other pages was not reproduced. UPDATE - after FF restart - problem was not reproduced.