When I navigate to a web page that requires a DjVu viewer I get an error message even after installing and opening Sumatra. I use Mozilla but have also tried Chrome and Explorer. Is there a way to copy the URL into Sumatra? I wasn’t able to find such a feature. It is probably something simple and I lack the experience. I hope someone can help. Below is the link if it helps to have an example (old Italian newspaper).
Thanks very much!