We have a lightbox for each e-learning course. When you close the lightbox you should be able to use the back button. In Firefox it works just fine.
In opera, edge and chrome (mobile) i took multiple attempts to go back. Researching that I noticed that what I click within the lightbox is registered in the browser history.
now firefox deletes the unnecessary browser history when I close the lightbox. The other browsers don’t. Does anyone know a good workaround for this or how to fix it?