What is RES (Reddit Enhancement Suite), and what features does it offer?

Reddit Enhancement Suite, commonly known as RES, is a community-developed browser extension that extends Reddit's functionality with a large collection of usability improvements. Available for Chrome, Firefox, Edge, and Safari, RES has been installed by over one million users and historically represented the standard toolkit for Reddit power users, though as of 2024 it has entered maintenance-only mode meaning new features will not be added, though existing features remain functional. RES's Never-Ending Reddit feature eliminates the need to click "next page" by automatically loading subsequent pages of content as you scroll to the bottom of the feed, creating an uninterrupted scrolling experience. The Inline Image Viewer expands images, GIFs, and video thumbnails directly within the feed without requiring a page navigation, which dramatically speeds up browsing image-heavy communities. These two features alone account for most of the productivity improvement that users attribute to RES. The User Tagger module allows users to attach personal notes and color-coded tags to other Reddit accounts. This is invaluable for moderators tracking problematic users across threads, for journalists following sources, and for anyone who interacts repeatedly with the same community members and wants context about those relationships. The User Highlighter module extends this by visually distinguishing original posters, moderators, and admin accounts within threads. The Account Switcher module enables seamless switching between multiple Reddit accounts without logging out and back in, which is useful for users who maintain separate personal and professional or moderation accounts. The Subreddit Manager enhances the subscription list with filtering, custom groupings, and quick navigation. The filteReddit module provides robust content filtering by keyword, domain, flair, and post type at a granularity that Reddit's native interface does not support. Keyboard Navigation within RES allows movement through posts and comments using J/K keys and other customizable shortcuts, comment expansion with the spacebar, and quick-link opening without using a mouse. Combined, these features make RES a significant productivity tool for anyone who spends substantial time on Reddit, particularly when using the old.reddit.com interface where it integrates most fully.