Is FireMonkey safe?

Clean risk

This extension manages and runs user scripts and user styles in Firefox.

It lets you install, update, import, export, and toggle JavaScript and CSS customizations, including scripts from supported script sites and local files. It can inject scripts and styles on all websites, access tabs and navigation activity to show running scripts, store saved scripts/CSS, use downloads for exports, write to the clipboard for copy actions, and show notifications.

0Risk
Who publishes it

erosman - 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
erosman

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.

openclipart.org
Also called by 3 other listings, including Sketchpad
userscript.zone
Also called by 3 other listings, including ScriptRunner - v3 userScript manager
uso.kkx.one
Also called by 3 other listings: Stylus (beta), Stylus, Stylus
sleazyfork.org
Also called by 4 other listings, including Stylus (beta), Stylus, Magic Userscript+
stylus-lang.com
Also called by 5 other listings, including Stylus (beta), Stylus, Stylus
eslint.style
Also called by 6 other listings
userstyles.world
Also called by 6 other listings, including Stylus (beta), Stylus, Stylus

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 FireMonkey 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.

  • greasyfork.org

    FireMonkey sends data to greasyfork.org. No other extension we have analysed sends data here.

  • openuserjs.org

    FireMonkey sends data to openuserjs.org. No other extension we have analysed sends data here.

  • sleazyfork.org

    FireMonkey sends data to sleazyfork.org. No other extension we have analysed sends data here.

Updated 15 October 2026amo-1019336