Yesterday For Old Reddit is a Firefox extension designed for users who prefer the classic Reddit interface. This subscription-based tool allows users to switch seamlessly to the old Reddit layout and disable subreddit styles for a uniform browsing experience across all subreddits. Key features include a dark mode option, color-coded comment lines for better readability, and the ability to filter threads by keywords or specific subreddits. Additionally, users can browse without needing to log in, eliminating annoying popups that often disrupt the experience.

The extension also offers privacy features, such as the ability to run in incognito mode, which can be enabled through the add-ons manager. Users can customize their settings via the preferences menu located within the extension or directly from the old Reddit interface. This extension is particularly useful for those who miss the simplicity of the old Reddit design and want to enhance their overall browsing experience.