我的狀況就像圖片這樣子

Getting a black screen after updating to Firefox 33 can be caused by a problem with hardware acceleration in Firefox. You can check if there is an update for your graphics display driver. *https://support.mozilla.org/kb/how-do-i-upgrade-my-graphics-drivers If that didn't work then try to disable hardware acceleration in Firefox. *Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available" You need to close and restart Firefox after toggling this setting. *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes *https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration