Is fontDownloader - Identify & download fonts safe?

Low risk

fontDownloader sends the active tab's URL and a browser fingerprint to an external server every time a script error occurs.

The extension's background script catches every JavaScript error, unhandled promise rejection, and console.error call, then posts the page URL, browser brand/version, and extension details to a Cloudflare Worker endpoint with no opt-out. It also fetches promotional content from a second Cloudflare Worker and inserts the response directly into its popup UI without sanitizing it. Separately, a persistent random ID created at install time is attached to the extension's uninstall-survey link and its Ko-fi donation link, allowing those visits to be tied back to a specific install.

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

Brahmastrav0.0.25Chrome Web Store
15Risk
Who publishes it

Brahmastra - 4 other listings from the same operator, none carrying a finding

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

Publisher
Brahmastra
Registered address
A102 Ground Floor, paryawaran complex, saiddullajab, New Delhi, Delhi 110030, IN
Registered contact
ANIL KUMAR

Same store account

3 other listings published from this account, 36k+ users between them, none of them carrying a finding.

autoTranslate30k+LowtabVertikal4k+LowfontSwap - Custom fonts for every website2k+Low

Same operator - 1 listing

Published under a different store account, but sharing the registered address, contact or declared legal entity this one gave the store.

1 more listing in the relationship graph, on paid plans →

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 0.0.25. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

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

    activeTab

  • Add items to the right-click menu

    contextMenus

  • Run its own code inside the pages you visit

    scripting

  • Store data in your browser

    storage

Where it sends data

Destinations our analysis observed fontDownloader 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.

  • bug-collector.collectionrail.workers.dev

    fontDownloader sends data to bug-collector.collectionrail.workers.dev. One other extension we have analysed sends data here.

  • extension-promotion.noterail.workers.dev

    fontDownloader sends data to extension-promotion.noterail.workers.dev. No other extension we have analysed sends data here.

  • ko-fi.com

    fontDownloader sends data to ko-fi.com. No other extension we have analysed sends data here.

  • uninstall-feedback.pages.dev

    fontDownloader sends data to uninstall-feedback.pages.dev. No other extension we have analysed sends data here.

Updated 30 September 2026jglleggplbpnldiciklliilcphefponm