Who is mSession Keeper for?

mSession Keeper is a consumer product built for firefox users who need to keep web application sessions active.

Is mSession Keeper free?

Yes — mSession Keeper is free to use.

What platforms does mSession Keeper run on?

mSession Keeper runs on the web and embeddable surfaces.

Is mSession Keeper still maintained?

Unverified. mSession Keeper 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 are alternatives to mSession Keeper?

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

Who makes mSession Keeper?

mSession Keeper is developed by pmorzonek.

How long has mSession Keeper been around?

mSession Keeper first shipped in 2012.

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mSession Keeper

Name: mSession Keeper
Author: pmorzonek

mozilla.orgBrowser DevTools & extensions

mSession Keeper is a Firefox extension for maintaining active sessions in web applications with inactivity timeouts. Users configure start, session, and stop URLs, with wildcard or regular-expression matching for flexible session rules.

FreeWebEmbeddableCloud-managed

Visit mozilla.org

Overview

6 features

mSession Keeper is a Browser DevTools & extensions project. It focuses on preventing web application sessions from expiring because of inactivity timeouts. It is built as a consumer product for firefox users who need to keep web application sessions active. mSession Keeper is free to use. It ships for the web and embeddable surfaces.

pmorzonek builds and maintains mSession Keeper, and it first shipped in 2012. Among its 6 catalogued features are session keepalive, URL monitoring, and periodic pinging. 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 keepalive
URL monitoring
Periodic pinging
Wildcard URLs
Regular expressions
Saved sessions

Built with & integrations

Runs on

BrowserEmbeddableCloud-managed

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed10 Sep · 11:07 UTC
mSession Keeper verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about mSession Keeper

What is mSession Keeper?: MSession Keeper focuses on preventing web application sessions from expiring because of inactivity timeouts. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is mSession Keeper for?: mSession Keeper is a consumer product built for firefox users who need to keep web application sessions active.
Is mSession Keeper free?: Yes — mSession Keeper is free to use.
What platforms does mSession Keeper run on?: mSession Keeper runs on the web and embeddable surfaces.
Is mSession Keeper still maintained?: Unverified. mSession Keeper 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 are alternatives to mSession Keeper?: Similar projects tracked by PulseGate include Session Keeper, Tab Session Manager, and Session Manager.Session Keeper Tab Session Manager Session Manager
Who makes mSession Keeper?: mSession Keeper is developed by pmorzonek.
How long has mSession Keeper been around?: mSession Keeper first shipped in 2012.

At a glance

Pricing: Free
Platforms: Web
First seen: 10 Sep 2026
Built for: Firefox users who need to keep web application sessions active
Model: B2C
Solves: Preventing web application sessions from expiring because of inactivity timeouts.

Registered as

Firefox Add-ons: msession-keeper

Developer

pmorzonek

Index record

Indexed: 10 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 10 Sep 2026

Identity audit (13)

Slug: msession-keeper-mozilla-org
Lifecycle state recorded: 10 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 10 Sep 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: 10 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/msession-keeper

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