Immersion, part of my screen becomes black.
Sometimes when I'm in immersion and click on a translated sentence to see its translation, part of my screen becomes black and stays on this page this way until I click on that sentence again, or click the button "back", so that translation disappears. Clicking on another tab in my browser and returning on Duo helps for some time, but then I get this black screen again. When I refresh the page it helps for a little bit longer, but anyway this black screen appears again in some time. Some screenshots: http://data2.floomby.com/files/share/25_6_2015/7/KvEykgEO6FGYRdgtNA.jpg http://data2.floomby.com/files/share/25_6_2015/21/1JLoYwCj0yJ04L0xNRzMg.jpg
Windows 7, Mozila Firefox. When I used Google Chrome before switching to Mozila, I didn't have this problem.