Extension.dev is built and run by one person, Cezar Augusto. This page explains, in plain English, what data the platform collects, why, and what you can do about it. It covers the hosted platform at extension.dev. The open-source Extension.js CLI has its own telemetry note in the docs.

What I collect

• Your account. When you sign in with GitHub, I receive your GitHub username, account id, and the email on your GitHub account.
• What you create. Project settings, extension source you write or import, AI prompts, and drafts you save.
• Usage. Pages viewed, actions taken, and basic device and approximate-location data, through the analytics tools below.

Why I use it

• To run, secure, and improve the platform.
• To build, preview, compile, and publish your extensions for you.
• To reply when you contact me, and (only if you opt in) send updates.

Who else touches it

A handful of vendors process data on my behalf so the platform can run. They only use it to provide their service to me:

• GitHub: sign-in, repository hosting, and CI builds.
• Vercel: application hosting.
• Cloudflare: the preview sandbox, storage, content delivery, and a Turnstile bot check on the preview flow. See Cloudflare’s Turnstile Privacy Addendum.
• PostHog and Google Tag Manager: product analytics.
• Substack: the email list, if you subscribe.
• AI model providers: to process your prompts when you use AI features.

Cookies

I use cookies for your session and for analytics. The cookie page has the details and your choices.

Keeping and deleting data

I keep your account and project data while your account is active. Drafts, generated artifacts, and analytics are kept on a rolling basis. You can ask me to delete your data at any time. Just email cezar@extension.dev.

Your choices

Depending on where you live, you may have the right to access, correct, export, or delete your data, or object to some processing. To do any of that, email cezar@extension.devand I’ll take care of it.

Where data lives

The vendors above may process data in the United States and elsewhere. Where required, transfers rely on appropriate safeguards.

Questions

Anything about privacy: cezar@extension.dev.