A simple extension that keeps a list of tribe members on the Survivor subreddit and injects an element to view them.
This chrome extension will keep track of which users are on which tribe on /r/Survivor.
The extension works by collecting a list of users on each page you visit on /r/Survivor and sorting each into a tribe based on the first letter of their username. Once that is finished, the list of users is saved to the browser's storage so that the list can continue to grow. When that is done, the extension generates an element in the bottom right corner of the page that allows you to view the tribes.