Is CSFloat Market Checker safe?

Clean risk

CSFloat Market Checker lets allowed Steam Community and CSFloat pages read its cached Steam Web API token from extension storage.

When trade tracking has populated the token, pages on allowed Steam Community and CSFloat origins can use the external message bridge to request the access_token key and receive token, steam_id, and updated_at. The bridge is limited to those configured origins, not arbitrary websites.

CSFloatv5.17.0Firefox Add-ons
0Risk
Who publishes it

CSFloat - no other listings under this identity, 7 shared hostnames

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

Publisher
CSFloat

Shared hosts - 7 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.

gateway.floatdb.com
Also called by 1 other listing: CSFloat
skincraft.gg
Also called by 1 other listing: CSFloat
avatars.cloudflare.steamstatic.com
Also called by 2 other listings
blog.csfloat.com
Also called by 2 other listings
notary.csfloat.com
Also called by 2 other listings, including CSFloat
reverse.watch
Also called by 2 other listings, including CSFloat
kushagra.dev
Also called by 3 other listings, including Fast IPTV Player - HLS M3U M3U8 EPG & VOD Streaming

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 5.17.0. 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 steamcommunity.com

    *://*.steamcommunity.com/market/listings/730/* and 3 more

  • Read and change your data on csfloat.com

    *://*.csfloat.com/*

  • Read and change your data on steampowered.com

    *://*.steampowered.com/*

  • Store data in your browser

    storage

  • Run its own code inside the pages you visit

    scripting

  • Schedule its own background tasks

    alarms

declarativeNetRequestWithHostAccess

Where it sends data

Destinations our analysis observed CSFloat Market Checker 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.

  • steamcommunity.com

    CSFloat Market Checker sends data to steamcommunity.com. 4 other extensions we have analysed send data here.

  • csfloat.com

    CSFloat Market Checker sends data to csfloat.com. No other extension we have analysed sends data here.

Updated 30 September 2026amo-761261