html select is cutted by half on mac
Hello! I have a small problem with my firefox. I have iMac (Retina 5K, 27-inch) with an additional screen (DELL U2412M) and when I have ff on this additional screen, bigger select lists are cutted by half (look at first attached image, second = good view). As you can see, list is bigger than firefox shows. Second image is from main iMac screen. Do you have any idea how to fix this problem? It's site independent so it is not a css problem. I tried to refresh ff and to disable hardware acceleration.