Is Lessonly Recording safe?

Low risk

Lessonly Recording exposes its installed status to every page through a DOM marker and window message.

Lessonly Recording injects a content script on all web pages and adds a hidden page element that says the extension is present. When the page loads, it also posts a message with a Hippovideo initiator to the page, so scripts on the visited site can detect that the extension is installed.

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

Lessonly by Seismicv2.0Chrome Web Store
19Risk
Who publishes it

Seismic Software - 2 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
Lessonly by Seismic
Declared legal entity
Seismic Software
Registered address
12390 El Camino Real, San Diego, CA 92130-2081, US
Registered contact
Seismic

Same operator - 2 listings

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

Shared hosts - 1 hostname

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.

hippovideo.io
Also called by 1 other listing: Hippo Video: Video and Screen Recorder

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 2.0. 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

  • Store data in your browser

    storage

  • Run its own code inside the pages you visit

    scripting

  • Sign you in with your Google account

    identity

  • See, disable and uninstall your other extensions, including your security ones

    management

Updated 30 September 2026ehlfmibfbjdfgempfpalhaoobjgfegfc