One more vote for making the Dark theme the default theme on install!

[ristomatti]

In case you haven't run across Dark Reader browser extension, you've been missing out:

Dark Reader — dark theme for every website

For the last few years it's been the single most useful piece of desktop software on this area of interest for me.

On mobile it's available for Firefox on Android but it's too laggy to my taste. But luckily there's at least Opera and (surprisingly) Samsung Internet browser's on Android which both have a stellar "night mode". No knowledge or tips on iOS equivalents unfortunately.