It seems Reddit has released a new design. If you have styles for Reddit, I suggest to update them, since they're most likely be obsolete. You can also create new styles for the new Reddit layout.
Reddit still supports the old design on a subdomain, so just the "applies to" urls have to be changed to make an old style work again. https://old.reddit.com/
/edit
This UserScript for tampermonkey cares about permanent redirection
// ==UserScript==
// @name Reddit redirect to old design
// @namespace stonecrusher
// @version 0.2
// @description Redirect from new to old design
// @author stonecrusher
// @match https://www.reddit.com/*
// @grant none
// @icon https://www.redditstatic.com/desktop2x/img/favicon/apple-icon-76x76.png
// ==/UserScript==
(function() {
'use strict';
window.location.replace("https://old.reddit.com" + window.location.pathname);
})();
This UserScript for tampermonkey cares about permanent redirection
// ==UserScript==
// @name Reddit redirect to old design
// @namespace stonecrusher
// @version 0.2
// @description Redirect from new to old design
// @author stonecrusher
// @match https://www.reddit.com/*
// @grant none
// @icon https://www.redditstatic.com/desktop2x/img/favicon/apple-icon-76x76.png
// ==/UserScript==
(function() {
'use strict';
window.location.replace("https://old.reddit.com" + window.location.pathname);
})();
That's a good solution, but don't forget to put a comment in the title or description about it, otherwise you'll probably get bad reviews from people thinking it isn't working.
Comments
Reddit still supports the old design on a subdomain, so just the "applies to" urls have to be changed to make an old style work again.
https://old.reddit.com/
/edit
This UserScript for tampermonkey cares about permanent redirection