e621 Subscriptions is a Firefox extension designed to improve user interaction with the e621.net platform. This free tool introduces a convenient 'Watched' button in the navigation bar, allowing users to easily subscribe to their favorite tags. Additionally, it features an 'OwO/XwX (Subscribe/Unsubscribe)' button for every tag displayed on the sidebar, streamlining the subscription process.

With this extension, managing tag subscriptions becomes effortless, enhancing the overall browsing experience on e621.net. Users can quickly keep track of updates related to their preferred tags, making it a valuable addition for avid fans of the platform. The user-friendly interface ensures that navigating through subscriptions is straightforward, catering to both new and experienced users.