Firefox browser offers the safe mode option -which on using temporarily disables add-ons and custom settings- which lets you troubleshoot issues having the browser. Similarly Google has added concept of Safe Mode hotkey start  to latest Chrome dev build which can be useful to troubleshoot issues having with Aura build where user with GPU has a possibility of getting "black window" without any UI. In such cases holding Ctrl+Alt shortcut while starting Chrome will launch browser with some set of flags and Chrome works just fine then.