Is Sky Follower Bridge safe?

Low risk

Sky Follower Bridge routes Bluesky avatar image requests through the developer's proxy server, disclosing which profiles are being compared.

When comparing social media accounts to Bluesky profiles, the extension fetches Bluesky CDN avatar URLs (cdn.bsky.app) via a proxy at server.sky-follower-bridge.dev rather than directly. Each proxied request includes the Bluesky user's DID embedded in the CDN URL, so the developer's server can observe which Bluesky profiles the user is looking up. This occurs in the background script during image similarity scoring and does not require any user interaction beyond normal extension use.

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

kawamataryov3.2.0Firefox Add-ons
15Risk
Who publishes it

kawamataryo - no other listings under this identity, 3 shared hostnames

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
kawamataryo

Shared hosts - 3 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

server.sky-follower-bridge.dev
Also called by 2 other listings, including Sky Follower Bridge
share.sky-follower-bridge.dev
Also called by 2 other listings, including Sky Follower Bridge
sky-follower-bridge.dev
Also called by 2 other listings, including Sky Follower Bridge

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

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 3.2.0. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on server.sky-follower-bridge.dev

    https://server.sky-follower-bridge.dev/*

  • Read and change your data on bsky.social

    https://bsky.social/*

  • Read and change your data on twitter.com

    https://twitter.com/*

  • Read and change your data on x.com

    https://x.com/*

  • Read and change your data on www.threads.net

    https://www.threads.net/*

  • Read and change your data on www.threads.com

    https://www.threads.com/*

  • Read and change your data on www.instagram.com

    https://www.instagram.com/*

  • Read and change your data on www.tiktok.com

    https://www.tiktok.com/*

  • Read and change your data on www.facebook.com

    https://www.facebook.com/*

  • Store data in your browser

    storage

  • Sign you in with your Google account

    identity

Where it sends data

Destinations our analysis observed Sky Follower Bridge 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.

  • server.sky-follower-bridge.dev

    Sky Follower Bridge sends data to server.sky-follower-bridge.dev. No other extension we have analyzed sends data here.

Updated 2 November 2026amo-2799708