I really like Dark Reader but many times even when dark mode is turned off the page loads up in dark mode and switches to light mode which brings into question if dark mode is always running(and using up battery) even when it's turned off. Also it's annoying when that happens because the screen is dark for a second and then turns to the normal light theme vs. staying in the unaltered light theme through the entire loading process. But the add-on is very good otherwise.