Mastodon Simplified Federation is a Firefox add-on designed to enhance user experience on the decentralized Mastodon social network. It simplifies the process of interacting with users across different servers in the Fediverse by eliminating the need to repeatedly enter your Mastodon handle. Once set up, the add-on automatically redirects users to their home instance, making actions like following or favoriting other users much more efficient. Additionally, it ensures user privacy by not exposing the Mastodon ID to third-party sites.

This add-on supports interactions with not just Mastodon but also other platforms in the Fediverse, including GNU Social, Friendica, and Pleroma, although support may vary. As a free and open-source tool, it encourages community involvement for translations and development improvements. Users can easily set it up by entering their Mastodon handle in the settings, after which the add-on operates seamlessly in the background.