Who is Session Boss for?

Session Boss is a consumer product built for firefox users who manage multiple browser tab sessions.

Is Session Boss free?

Yes — Session Boss is free to use.

What platforms does Session Boss run on?

Session Boss runs on the web and embeddable surfaces.

Is Session Boss still active?

Unverified. Session Boss 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 Session Boss?

Similar projects tracked by PulseGate include Tab Sessions, Session Manager, and TabNest.

Who develops Session Boss?

Session Boss is developed by William Wng.

How long has Session Boss been around?

Session Boss first shipped in 2018.

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Session Boss

Name: Session Boss
Author: William Wng

mozilla.orgBrowser DevTools & extensions

Session Boss is a Firefox extension that saves and restores browser windows, tabs, and tab containers. It supports scheduled and change-triggered backups, session grouping, search and filtering, lazy tab loading, and undo/redo operations for individual users.

FreeWebEmbeddable

Visit mozilla.org

Overview

10 features

Session Boss is a Browser DevTools & extensions project. It focuses on losing or manually rebuilding browser windows and tabs after closing or changing browsing sessions. Session Boss is a consumer product aimed at firefox users who manage multiple browser tab sessions. Session Boss costs nothing to use. Session Boss is available on the web and embeddable surfaces.

It is developed by William Wng, and it first shipped in 2018. Key capabilities include session saving, session restoration, and individual tab restore. The interface is available in 32 languages, including Czech, German, and Greek.

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

Session saving
Session restoration
Individual tab restore
Tab container support
Scheduled backups
Change-triggered backups
Session grouping
Session search
Lazy tab loading
Undo and redo

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed8 Sept · 11:30 UTC
Session Boss verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Session Boss

What is Session Boss?: Session Boss focuses on losing or manually rebuilding browser windows and tabs after closing or changing browsing sessions. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Session Boss for?: Session Boss is a consumer product built for firefox users who manage multiple browser tab sessions.
Is Session Boss free?: Yes — Session Boss is free to use.
What platforms does Session Boss run on?: Session Boss runs on the web and embeddable surfaces.
Is Session Boss still active?: Unverified. Session Boss 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 Session Boss?: Similar projects tracked by PulseGate include Tab Sessions, Session Manager, and TabNest.Tab Sessions Session Manager TabNest
Who develops Session Boss?: Session Boss is developed by William Wng.
How long has Session Boss been around?: Session Boss first shipped in 2018.

At a glance

Pricing: Free
Platforms: Web
First seen: 8 Sept 2026
Built for: Firefox users who manage multiple browser tab sessions
Model: B2C
Solves: Losing or manually rebuilding browser windows and tabs after closing or changing browsing sessions.

Registered as

Firefox Add-ons: session-boss

Developer

William Wng

Index record

Indexed: 8 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 8 Sept 2026

Identity audit (13)

Slug: session-boss-mozilla-org
Lifecycle state recorded: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 8 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
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: 8 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/session-boss

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