Is Manganum: Sidebar with Gmail and Google Calendar safe?

Medium risk

Manganum Sidebar sends every Google search query to its own servers and includes the user's Google email address in event telemetry.

When a user navigates to Google Search, the extension extracts the search query and transmits it via POST to ai.manganum.app. Separately, the extension collects usage events and flushes them in batches to api.manganum.app, each event enriched with the signed-in Google account email address, browser fingerprint details, and extension metadata.

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

Manganum Inc.v25.6.15Chrome Web Store
46Risk
Who publishes it

Manganum Inc. - no other listings under this identity, 3 shared hostnames

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

Publisher
Manganum Inc.
Declared legal entity
Manganum Inc.
Registered address
600 N Broad Street, Suite 5 #3434, Middletown, Delaware 19709, United States
Registered contact
Uladzimir Yankovich, CEO

Shared hosts - 3 hostnames

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.

ai-dev.manganum.app
Also called by 2 other listings: FasterWeb, Bookmarks Checker - Remove broken links
manganum.app
Also called by 2 other listings: Sidebar for Google Tasks, Button for Google Calendar
nebezb.com
Also called by 6 other listings, including Offline Games To Play, Free Time Games

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 25.6.15. 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

    http://*/*

  • Read and change your data on every secure site you visit

    https://*/*

  • Store data in your browser

    storage

  • Store an unlimited amount of data in your browser

    unlimitedStorage

  • Read the sites you visit most

    topSites

  • Read and change your full browsing history

    history

  • Schedule its own background tasks

    alarms

  • Run its own code inside the pages you visit

    scripting

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

    cookies

  • Add items to the right-click menu

    contextMenus

  • Read and change your tab groups

    tabGroups

  • Read and change your bookmarks

    bookmarks

  • Run hidden pages in the background

    offscreen

  • Show a panel beside the page

    sidePanel

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

    tabs

  • Read and restore your recently closed tabs and windows

    sessions

  • Detect when you step away from your computer

    idle

  • Run searches with your default search engine

    search

favicondeclarativeNetRequestWithHostAccess

Where it sends data

Destinations our analysis observed Manganum 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.

  • ai.manganum.app

    Manganum sends data to ai.manganum.app. No other extension we have analysed sends data here.

  • api.manganum.app

    Manganum sends data to api.manganum.app. No other extension we have analysed sends data here.

Updated 30 September 2026jbfeongihppeenfnaofmdeikahaefljd