Is C2 Password safe?

Clean risk

Manages passwords by autofilling logins, saving credentials, and generating random passwords in the browser.

This extension connects to C2 Password so users can access synced credentials across devices, autofill usernames and passwords, and save new or updated login details. It can generate random passwords and fill saved payment or personal information into online forms. Its permissions allow it to run on all websites, access page navigation and requests, store data locally, write to the clipboard, and use C2 profile authenticator-verification pages.

Synology Inc.Firefox Add-ons
0Risk
Who publishes it

Synology Inc. - no other listings under this identity, 8 shared hostnames

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

Publisher
Synology Inc.

Shared hosts - 8 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.

c2.synology.com
Also called by 1 other listing: C2 Password
profile.c2.c2go.dev
Also called by 1 other listing: C2 Password
profile.c2.synology.com
Also called by 1 other listing: C2 Password
profile.c2test.synology.com
Also called by 1 other listing: C2 Password
webmail.aol.com
Also called by 2 other listings
kb.synology.com
Also called by 4 other listings, including Download Station (client for Synology NAS), AI Chat Organizer & Outline Navigator for ChatGPT/Claude/Gemini - Ophel
sy.to
Also called by 4 other listings, including Synology Image Assistant Extension, Synology Image Assistant
synology.com
Also called by 5 other listings, including Synology Browser Notification

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 C2 Password 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.

  • profile.c2.c2go.dev

    C2 Password sends data to profile.c2.c2go.dev. No other extension we have analysed sends data here.

  • profile.c2.synology.com

    C2 Password sends data to profile.c2.synology.com. No other extension we have analysed sends data here.

  • profile.c2test.synology.com

    C2 Password sends data to profile.c2test.synology.com. No other extension we have analysed sends data here.

  • Synology

    C2 Password sends data to Synology. Named as a recipient in this extension's own analysis.

Updated 15 October 2026amo-2750259