I'm using Firefox 43.0.4. I have a problem with drop down boxes disappearing immediately after they appear. This doesn't affect the menu bar of Firefox, but it does affect the address bar, search bar and any drop down menus on web pages. Others have reported this problem in the past and they have been told to disable hardware acceleration, but this doesn't work for me. I'm also having a problem with your website. When I press the right-hand shift key, it starts to load the previous page, which is very annoying when I'm trying to type capital letters.