Here is a comment from a customer I've put through the ringer trying to fix it. I have to close the browser by right click on Firefox icon in tray and click on close. The game is now available on PC, and the PS4, as well as mobile devices. iMac graphics problems in the form of flashing white horizontal lines that appear randomly on the screen.These are all problems which are frequent among Facebook games’ webpages. Press the Alt and Tab keys together (Alt + Tab) several times. the screen came back to NARMAL(!) showing my desktop which was a higher resolution than that of the game….
Don't worry! Here are complete tips to solve YouTube white screen problem. At GamesGames, you can try out everything from kids games to massive multiplayer online games that will challenge even the best of players.