Performance Manager for Firefox

Name: Performance Manager for Firefox
Author: Mihai Lungu

Keep Firefox responsive by intelligently sleeping inactive tabs, reducing memory usage and improving browsing performance.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-09-20

Version:

1.0.1

Last updated: 2026-09-09

Features & Capabilities

Performance Manager for Firefox helps keep Firefox responsive by intelligently sleeping inactive tabs.

Key features: • Automatically sleep inactive tabs after a configurable period • Smart memory modes: Balanced, Aggressive, Maximum Savings and Custom • Maximum awake-tab limit to reduce resource usage • Quick actions to free memory by sleeping inactive tabs • Activity Log showing tabs that were put to sleep, restored or skipped • Tab Performance Manager for monitoring and manually managing tabs • Per-site rules with custom sleep times or Always Awake protection • Protection for active, pinned, audible, loading and private tabs • No analytics, tracking or external servers — processing happens locally in Firefox

The extension does not directly limit Firefox's total RAM usage. Instead, it reduces resource usage by unloading eligible inactive tab content from memory.

User Growth & Download Statistics

Add-on

By:

Mihai Lungu

Daily users:

Version:

1.0.1 Last updated: 2026-09-09

Version code:

6465574

Creation date:

2026-09-06

Firefox add-on GUID:

firefox-performance-manager@mihai-lungu

Firefox add-on numeric ID:

3067254

Weekly download count:

Firefox on Android:

Risk:

Permissions:

Size:

41.49KB

Email:

mi*****@proton.me

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-20

Compare stats and ranking:

Ranking

# 120,681 ▲ 24,258

Other rankings

#33 in performance keyword 15 ▲ 24

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Mihai Lungu

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/performance-manager-fx/

Email:

mi*****@proton.me

Website:

https://lungumihai03.github.io/performance-manager-for-firefox/

Is Performance Manager for Firefox Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Performance Manager for Firefox requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Performance Manager for Firefox is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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