Privacy

Nothing about your conversations leaves your browser.

Fuse schedules and sends a message you've already written. It doesn't need a server to do that, so it doesn't have one. Here's exactly what happens, and what doesn't.

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No network calls

Scheduling a message, detecting a rate-limit reset time, and clicking send all happen inside the tab. Fuse doesn't send anything to a server, because it doesn't run one.

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No accounts, no sign-in

There's nothing to create and nothing tied to your identity. Install it and start arming schedules.

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No analytics, no telemetry

Fuse doesn't know how many messages you've scheduled, which conversations you're in, or that you exist. Nothing is collected because nothing is sent anywhere.

What's actually stored

One thing, kept locally, and only if you use it.

The only data Fuse stores is the schedule itself: which conversation it belongs to, the time you chose, and, only if you set one, the text of a follow-up message. All of it stays in your browser's local storage on your own machine. It's never uploaded anywhere, and clearing your browser data clears it too.
To check whether it's time to send, Fuse looks at whether your composer is empty or not. It doesn't read or store the content of your replies from Claude or ChatGPT, and it doesn't log your conversation history.
Permissions

What each one is actually used for.

storage Saves your armed schedules locally, so they survive a page reload. This is the only thing Fuse remembers, and it never leaves your machine.
alarms Lets Fuse wake up at the exact scheduled time, rather than relying on the tab staying in the foreground the entire time.
scripting Injects the code that reads your composer, detects the rate-limit message, and clicks send at the scheduled moment.
host access Limited to claude.ai and chatgpt.com. Fuse doesn't run on, or read, any other site you visit.
Honest limits

A browser extension, not a background service.

Because Fuse has no server, a scheduled send only fires if the tab is still open when the time comes. It can sit in the background, but closing it cancels the schedule. If you switch to a different conversation in a tab that has an armed schedule, Fuse cancels that schedule too, rather than risk sending your message to the wrong chat.

Questions about how it works?

The full walkthrough covers detection, retries, and the dashboard.

See how it works