And if you want to take an extra step further towards darkness bliss, you can give your web browser itself the dark mode treatment.
Chrome and Firefox have theme stores where you can download and install darker themes for the browser itself, like the navigation and tabs bar at the top where Dark Reader doesn't work.
Above, I'm using the "Material Simple Dark Gray" theme for Chrome.
But Dark Reader isn't totally perfect.
Using Dark Reader might make certain sites load a little more slowly than usual, as the extension is processing and changing a site's original colors into dark mode.
Gmail, in particular, lags quite a bit whenever I go back to my Gmail tabs. Luckily, you can set Dark Reader to disable itself for certain sites that you visit often where you don't want any lag.
Also, you may occasionally get a bright white flash while visiting a new site or opening a tab. That's because, according to Dark Reader's FAQ, your web browser initially loads a site in the default color theme, which is usually bright. You can fix the bright flash by using a dark theme for your browser.