Signavio Workflow Accelerator supports all popular browsers. At https://www.signavio.com/browser-compatibility you find a detailed description of the supported browsers. The site also automatically checks whether you browser supports the Signavio products.
Since Microsoft stopped supporting Internet Explorer 9 and 10 for most platforms on January 12, 2016 , it is getting increasingly difficult for Signavio to provide a state-of-the-art user experience while supporting these browsers. As we want to continue innovating and provide the best features and user experience possible, we stopped supporting Microsoft Internet Explorer 9 and 10 on December 31, 2017. We recommend switching to one of the browsers supported by Signavio.