Based on our record, User JavaScript and CSS seems to be a lot more popular than Dark Night Mode. While we know about 13 links to User JavaScript and CSS, we've tracked only 1 mention of Dark Night Mode. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Https://darknightmode.com This one works great for me, they also have a version for Firefox to, last I checked. Source: about 4 years ago
You can use such scripts on tampermonkey (chrome) or greasemonkey (for firefox) or User Javascript an CSS injector. Source: almost 2 years ago
Speaking of Kbin, I made a blue theme (before) that anyone can use. Here is the CSS code. To apply it, use the chrome/brave extension called 'User JavaScript and CSS'. There are other extensions in different browsers that do the same thing, just search for custom CSS and apply the css code to kbin.social. Source: almost 2 years ago
I recommend this to use it: https://chrome.google.com/webstore/detail/user-javascript-and-css/nbhcbdghjpllgmfilhnhkllmkecfmpld. Source: over 2 years ago
Goto https://chrome.google.com/webstore/detail/user-javascript-and-css/nbhcbdghjpllgmfilhnhkllmkecfmpld, click "add to Opera" and click "add extension" to install it. Source: over 2 years ago
You might be able to use this extension to apply CSS that specifies a background image to sites you want. Source: over 2 years ago
Dark Reader - Reduce eye strain in your browser with this extension that provides a dark theme for browsing.
Dark Mode - A global dark theme for the web
Tampermonkey - Greasemonkey compatible script manager.
Midnight Lizard - Accessible color schemes for all websites
Violentmonkey - Violentmonkey is a userscript manager to support running userscripts in web pages.
Night Eye - Night Eye is a browser extension that enables dark mode on any website you visit. It does not ruin your browsing experience by simply inverting images.