Is Dark Background and Light Text safe?

Clean risk

Dark Background and Light Text modifies Content-Security-Policy and CORS headers on every page to enable its dark-mode style injection.

The extension intercepts HTTP response headers on all websites to strip or weaken style-src CSP directives and inject 'unsafe-inline', allowing it to apply custom dark-mode CSS on any page. It also rewrites Access-Control-Allow-Origin headers on stylesheet responses so cross-origin CSS can be fetched and recolored. No user data is transmitted to external servers; all processing is local within the browser.

Mikhail Khvoinitskyv0.7.7Firefox Add-ons
3Risk
Who publishes it

Mikhail Khvoinitsky - no other listings under this identity

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

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 0.7.7. 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

  • Store data in your browser

    storage

  • Watch every request your browser makes

    webRequest

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

browserSettingspublicSuffix
Updated 2 November 2026amo-497798