Who is Performance Manager for?

Performance Manager is a consumer product built for firefox users who manage many open tabs.

Is Performance Manager free?

Yes — Performance Manager is free to use.

What platforms does Performance Manager run on?

Performance Manager runs on the web and embeddable surfaces.

Is Performance Manager still active?

Unverified. Performance Manager 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.

Who develops Performance Manager?

Performance Manager is developed by Lungu Mihai.

When did Performance Manager launch?

Performance Manager first shipped in 2026.

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Performance Manager

Name: Performance Manager
Author: Lungu Mihai

github.ioBrowser DevTools & extensions

Performance Manager for Firefox automatically sleeps inactive tabs to reduce resource usage while allowing them to be restored when needed. It includes configurable sleep timing, memory modes, site rules, tab controls, and an activity log, with settings stored locally in Firefox.

FreeWebEmbeddable

Visit github.io

Overview

8 features

Performance Manager is a Browser DevTools & extensions project. It focuses on reducing Firefox memory and resource usage without manually managing inactive tabs. It is built as a consumer product for firefox users who manage many open tabs. Performance Manager costs nothing to use. It runs on the web and embeddable surfaces.

Lungu Mihai builds and maintains Performance Manager, and it first shipped in 2026. Key capabilities include automatic sleeping, smart memory modes, and tab manager.

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

Automatic sleeping
Smart memory modes
Tab manager
Site rules
Activity log
Manual tab sleeping
Tab restoration
Local data storage

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed10 Sept · 00:53 UTC
Performance Manager for Firefox verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Performance Manager

What is Performance Manager?: Performance Manager focuses on reducing Firefox memory and resource usage without manually managing inactive tabs. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Performance Manager for?: Performance Manager is a consumer product built for firefox users who manage many open tabs.
Is Performance Manager free?: Yes — Performance Manager is free to use.
What platforms does Performance Manager run on?: Performance Manager runs on the web and embeddable surfaces.
Is Performance Manager still active?: Unverified. Performance Manager 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.
Who develops Performance Manager?: Performance Manager is developed by Lungu Mihai.
When did Performance Manager launch?: Performance Manager first shipped in 2026.

At a glance

Platforms: Web
Languages: English
First seen: 10 Sept 2026
Built for: Firefox users who manage many open tabs
Model: B2C
Solves: Reducing Firefox memory and resource usage without manually managing inactive tabs.

Registered as

Firefox Add-ons: performance-manager-fx

Developer

Lungu Mihai

Index record

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

Identity audit (13)

Slug: performance-manager-for-firefox-github-io
Lifecycle state recorded: 10 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 10 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: 10 Sept 2026
Canonical URL: https://lungumihai03.github.io/performance-manager-for-firefox

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