Is Feature Queries Manager safe?

Clean risk

Feature Queries Manager reads CSS @supports rules and stylesheet URLs from pages opened in its DevTools panel.

When you open its DevTools panel, the extension scans the inspected page's stylesheets for CSS @supports feature queries. It sends the matching rule text and stylesheet URL or inline-style marker back to its DevTools panel so you can view or toggle those rules.

ireaderinokunv0.4resigned1Firefox Add-ons
2Risk

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 0.4resigned1. 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>

  • 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

Updated 30 September 2026amo-963373