Who is Messenger Sidebar for?

Messenger Sidebar is a consumer product built for firefox users who want persistent access to Messenger.

Does Messenger Sidebar have a free plan?

Yes — Messenger Sidebar is free to use.

What platforms does Messenger Sidebar run on?

Messenger Sidebar runs on the web, embeddable surfaces, Windows, macOS, and Linux.

Is Messenger Sidebar still maintained?

Unverified. Messenger Sidebar has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Messenger Sidebar?

Similar projects tracked by PulseGate include Facebook Messenger Sidebar, Facebook Messenger as, and Sidebar for Facebook™.

Who makes Messenger Sidebar?

Messenger Sidebar is developed by Aguynamedkent.

When did Messenger Sidebar launch?

Messenger Sidebar first shipped in 2025.

Back to the index

Messenger Sidebar

Name: Messenger Sidebar
Author: Aguynamedkent

mozilla.orgBrowser DevTools & extensions

Messenger Sidebar is a Firefox browser extension that embeds the Messenger web app in a persistent sidebar. It is intended for users who want to access Messenger while browsing without opening a separate tab.

FreeWebEmbeddableWindowsmacOSLinux

Visit mozilla.org

Overview

5 features

Messenger Sidebar is a Browser DevTools & extensions project. It focuses on keeping Messenger accessible while browsing without switching between tabs or windows. Messenger Sidebar is a consumer product aimed at firefox users who want persistent access to Messenger. Messenger Sidebar is free to use. Messenger Sidebar is available on the web, embeddable surfaces, Windows, macOS, and Linux.

Behind Messenger Sidebar is Aguynamedkent, and it first shipped in 2025. Among its 5 catalogued features are messenger sidebar, persistent access, and content blocking. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Messenger sidebar
Persistent access
Content blocking
Optional permissions
Firefox integration

Built with & integrations

Runs on

BrowserEmbeddableWindowsmacOSLinux

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed17 Sep · 22:28 UTC
Messenger Sidebar verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Messenger Sidebar

What is Messenger Sidebar?: Messenger Sidebar focuses on keeping Messenger accessible while browsing without switching between tabs or windows. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Messenger Sidebar for?: Messenger Sidebar is a consumer product built for firefox users who want persistent access to Messenger.
Does Messenger Sidebar have a free plan?: Yes — Messenger Sidebar is free to use.
What platforms does Messenger Sidebar run on?: Messenger Sidebar runs on the web, embeddable surfaces, Windows, macOS, and Linux.
Is Messenger Sidebar still maintained?: Unverified. Messenger Sidebar has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Messenger Sidebar?: Similar projects tracked by PulseGate include Facebook Messenger Sidebar, Facebook Messenger as, and Sidebar for Facebook™.Facebook Messenger Sidebar Facebook Messenger as Sidebar for Facebook™
Who makes Messenger Sidebar?: Messenger Sidebar is developed by Aguynamedkent.
When did Messenger Sidebar launch?: Messenger Sidebar first shipped in 2025.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who want persistent access to Messenger
Model: B2C
Solves: Keeping Messenger accessible while browsing without switching between tabs or windows.

Registered as

Firefox Add-ons: messenger-sidebar

Developer

Aguynamedkent

Index record

Indexed: 17 Sep 2026
Lifecycle: Alive
Last seen: 17 Sep 2026

Identity audit (13)

Slug: messenger-sidebar-mozilla-org
Lifecycle state recorded: 17 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 17 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 17 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/messenger-sidebar

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