I dont k ow what happened ed to my dark or light option for the Firefox screen o. My bra d new Android. It's working right now for the de ice and whe. I first downloaded Girefox, I had the option at the. Bottom of screen to choose a dark or light theme. It is not there any longer nor is the settings options at the top and bottom of the home page. The hone page looks totally different, like it is an older version. I uninstalled it the. REI stalled and it is supposedly an up to date version but I have a lot of se purity options so I dont know...