Is File Centipede safe?

Clean risk

File Centipede collects page cookies, media URLs, and HLS keys for its local download workflow.

File Centipede injects content scripts into all HTTP, HTTPS, FTP, and file pages at document start. When its downloader or collector features run, it packages page URLs, cookies, user agent strings, detected media URLs, and HLS keys into download or collector messages for the local FileCXX workflow.

namelessitguyv2.99.6Firefox Add-ons
3Risk
Who publishes it

namelessitguy - 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
namelessitguy

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.

stdjs.com
Also called by 2 other listings, including File Centipede
ui.stdjs.com
Also called by 2 other listings, including File Centipede
filecxx.com
Also called by 3 other listings, including File Centipede

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 2.99.6. 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 every site you visit

    <all_urls> and 2 more

  • Read and change your data on every secure site you visit

    https://*/*

  • See the address and title of every tab you have open

    tabs

  • Act on the current tab, but only after you click the extension

    activeTab

  • Read and change cookies, including the ones that keep you signed in

    cookies

  • Add items to the right-click menu

    contextMenus

  • Watch every request your browser makes

    webRequest

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

  • See every page you navigate to, as you navigate to it

    webNavigation

  • Store data in your browser

    storage

  • Start, monitor and manage your downloads

    downloads

  • Block and redirect the requests your browser makes

    declarativeNetRequest

Where it sends data

Destinations our analysis observed File Centipede 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.

  • localhost:10111

    File Centipede sends data to localhost:10111. Named as a recipient by 1 other extensions we have analysed.

Updated 30 September 2026amo-2748790