When we click any of the buttons of the html editor menu it is opening the dropdown at the top of the page in FIREFOX. The options in the dropdown are not clickable. It happens with both Telerik and Rad editors. I am using MinimalExtropy skin. Can you help with the issue please?

We are using Evoq Content 7.3.3. We tried their support, but they couldn't find a solution.

Screenshot

Thanks.