Leave a message on any page

Short notes for whoever visits next. A browser extension shows what people left on the page you're reading, and lets you leave your own.

How it works

Soapstone is built on atproto, the protocol behind Bluesky. You sign in with a handle you already have, and every message you write is stored as a record in your own repository — not in a database here. This site runs an index over the public firehose so that messages become findable by the page they were left on. Delete a message from your repo and it disappears from here too.

The extension never sends the appview a URL. It sends a SHA-256 hash of it, so pages that have no messages — nearly everything you browse — leave nothing behind that can be read back.

Install

Not published yet. Build it from source with bun install && bun run build, then load .output/chrome-mv3 or .output/firefox-mv2 unpacked.

Right now

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