Is ytsync-silph safe?

Low risk

ytsync-silph sends the YouTube video URL and playback time to a third-party store every 10 seconds.

While a YouTube watch tab is active, the extension reads the video's current playback time every 10 seconds. It then sends the full watch URL and timestamp, keyed to a random user ID, through a personal Cloudflare Worker proxy to an unauthenticated keyvalue.immanuel.co store. Anyone who knows or guesses the ID could read the stored watch history.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

duarte.madureira.lopesv1.0Chrome Web Store
15Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Where it sends data

Destinations our analysis observed ytsync-silph contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • cors-lopix.duarte-madureira-lopes.workers.dev

    ytsync-silph sends data to cors-lopix.duarte-madureira-lopes.workers.dev. No other extension we have analysed sends data here.

  • keyvalue.immanuel.co

    ytsync-silph sends data to keyvalue.immanuel.co. No other extension we have analysed sends data here.

Updated 15 October 2026bgflobfccdggmjlbcngfncgfcfpabbmf