Here you can find information about the signing service and check its operation.
With B-Trust BISS you can:
Most modern browsers impose restrictions on the use of Java applets or ActiveX controls, by which help was performed the process of signing content by an electronic signature in a browser.
Due to the imposed restriction, signing in a browser is possible only with the help of specialized software, such as the B-Trust BISS service.
If for some reason the service does not start, it must be activated manually.