MultiMessengerWeb messenger
A messaging service you use through a web browser instead of a dedicated app — WhatsApp Web, Discord's web client and Telegram Web are examples. It shows the same conversations as the phone or desktop app, running as a web page, which is why it works on any device with a browser but traditionally lives inside a browser tab.
Messenger wrapper
A desktop app that loads the real web version of one or more messaging services inside its own window instead of re-implementing chat. You sign in to each service directly, and the wrapper adds desktop conveniences such as notifications, isolated sessions per account and keyboard switching. MultiMessenger and Franz are examples.
Session isolation
Keeping each account's cookies, cache and sign-in state in its own container so accounts cannot see or interfere with each other. A browser normally shares one cookie jar per profile, which is why adding a second WhatsApp Web tab tends to sign the first one out; isolated sessions are how a desktop app runs several accounts of the same service side by side.
Multi-account
Running more than one account of the same or different services at once, each staying signed in independently. It relies on session isolation — without it, signing in to a second account of a service would sign the first one out, as happens in a single ordinary browser tab.
Unread badge
A small number shown on an app or account icon indicating messages you haven't opened yet, typically seen on the taskbar or in a sidebar. Not every messaging service exposes an unread count through its web version, so a wrapper app can only show a badge for services that report one.
System tray
The area near the Windows clock holding icons for apps running in the background. An app that "closes to tray" keeps running and receiving notifications when its window is closed — clicking the tray icon reopens the window, and right-clicking it usually offers a Quit option to fully exit.
Desktop notification
A system-level alert (a Windows toast) that appears whether or not the app is in focus, as long as the app is running. It differs from a browser notification, which only fires while the browser itself is open and the site has been granted permission to show alerts.
QR linking
The way WhatsApp Web pairs a browser or desktop session with your phone: WhatsApp on the phone scans a QR code shown on the screen you're linking, which authorizes that session without typing a password. The phone needs to reconnect to the internet occasionally to keep linked sessions active.
End-to-end encryption
A security property where only the sending and receiving devices can read a message — not the service operator in between. It's a property of the messaging service itself (WhatsApp offers it by default, for instance); not every messaging service provides it, and a desktop wrapper that loads a service's real web version neither adds nor removes whatever encryption that service already offers.
Text expansion
Typing a short trigger, such as /omw, that automatically expands into a longer saved phrase as you type it in a chat. It saves retyping common replies across conversations and services. MultiMessenger's Snippets feature is a text expansion tool built into the app, available on the free plan.
Missing a term? Tell us via the Support page — the glossary grows with the help pages.