Dark mode is a great feature and one of the reasons I love android. Especially with an OLED screen to conserve battery power but also save the eyes. Firefox's dark mode is not for the following reasons. - in between tabs/websites when the page data is loading a blaring white screen is displayed. This when contrasted to a website that is dark using DarkReader is quite blinding. - It's dark but it as most reputable apps are offering a OLED dark mode to allow for the battery saving feature of having pixels being turned off. This should be enabled as a Firefox option or allow themes to do this for you. I'm using - Firefox - Firefox beta