I was unable to find a way to white-list sites because I didn't noticed little owl icon in address bar.... Stupid me. This addon is officially absolute best for night owls like myself. Works amazingly well - I was looking for something like that for a long time, using multiple addons to fix look on various sites, struggling and bloating my Firefox. No need for that anymore. AND it will also work with upcoming FF57 which is great. Thanks a LOT tk! Amazing job! I will donate little something as soon as my paycheck comes and you all should!