Is Kaspersky Protection 2021 safe?

Clean risk

Kaspersky Protection 2021 forwards browsing URLs, form credentials, and cookies to the local Kaspersky desktop app via native messaging.

The extension monitors navigation events, XHR request URLs, and tab lifecycle changes, forwarding each event to the Kaspersky native host running on the same machine. On password and login form submissions, it reads field values and sends either an MD5 hash of the password or base64-encoded usernames to the local Kaspersky product. It also relays browser cookie read and write operations for any URL at the request of the local application.

Kasperskyv2.16.2.3Firefox Add-ons
3Risk
Who publishes it

Kaspersky - no other listings under this identity

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

Publisher
Kaspersky

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 2.16.2.3. 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>

  • Talk to a program installed on your computer, outside the browser's sandbox

    nativeMessaging

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

    cookies

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

    tabs

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

    webNavigation

  • Watch every request your browser makes

    webRequest

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

  • Add items to the right-click menu

    contextMenus

  • Store data in your browser

    storage

Where it sends data

Destinations our analysis observed Kaspersky Protection 2021 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.

  • com.kaspersky.light_plugin_7571494CE0B94E11BB762B659A4AD71F.kaspersky.com.host

    Kaspersky Protection 2021 sends data to com.kaspersky.light_plugin_7571494CE0B94E11BB762B659A4AD71F.kaspersky.com.host. No other extension we have analyzed sends data here.

Updated 2 November 2026amo-1483643