How to unsubscribe from all subreddits:

unsub.md

1. Go to https://www.reddit.com/subreddits/
2. Go to console

Paste:

Array.from(document.querySelectorAll(`span.fancy-toggle-button.subscribe-button.toggle > a.option.active.remove.login-required`)).forEach((node, i) => setTimeout(() => { node.click(); console.log('leave node'); }, i*500));