reddit.com changed the interface of their website a year or two ago. I won't go into more detailed criticism of the changes beyond saying that it has a deficient level of information density for practical use.

After the change was introduced however, the previous styling could still be accessed by changing URLs to the old.reddit.com subdomain. The website provides a configuration setting for logged in users to set this permanently, but this is problematic for a number of reasons. First, it has had a history of issues and bugginess (which may be resolved now, but it is uncertain that all use cases were caught). And second, this would obviously not work for anonymous sessions without a significant amount of tedious manual changes.

So I wrote a Greasemokney script to resolve this. It provides a much more robust solution to this issue:

    // ==UserScript==
    // @name        Old reddit
    // @namespace   oldreddit
    // @include     *://reddit.com/*
    // @include     *://www.reddit.com/*
    // @include     *://reddit.com
    // @include     *://www.reddit.com
    // @version     1
    // @grant       none
    // ==/UserScript==

    window.location.replace(
        window.location.protocol + "//old.reddit.com" + window.location.pathname);

I'm aware that people typically share scripts like this on sites like greasyfork.org, but it's too much hassle to set up accounts for websites these days.