LightSession Pro for ChatGPT

Name: LightSession Pro for ChatGPT
Rating: 4.1739 (23 reviews)
Author: Emil K

By: Emil K

Fix slow, laggy ChatGPT tabs in Firefox. Local-only extension that speeds up long conversations by trimming old messages from the page (no data leaves your browser).

Download

Install

Features & Capabilities

LightSession Pro for ChatGPT is a local-only browser extension that speeds up long ChatGPT conversations by trimming older messages from the page. Your real chat history stays on OpenAI's servers; only the current page's DOM is trimmed, ensuring no data leaves your device.

How it works: it runs entirely in your browser, keeping only the last N messages (configurable), trimming after a response finishes streaming, and pausing the trim while you scroll to read history. It features a simple popup toggle, a configurable messages-to-keep setting, and a Refresh button to reload full history. All processing is 100% local with no data collection or analytics, and the code is open source on GitHub. Works on chat.openai.com and chatgpt.com.

User Growth & Download Statistics

Add-on Privacy & Security Developer Tools Open Source Data

By:

Emil K

Daily users:

2,122 2

Rating:

4.17

(23)

Version:

1.7.5 Last updated: 2026-04-09

Version code:

6214068

Creation date:

2025-11-05

Risk:

Permissions:

Host permissions:

*://chat.openai.com/*
*://chatgpt.com/*

Content scripts matches:

chat.openai.com
chatgpt.com

Size:

30.82KB

Email:

li*****@proton.me

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-03

Compare stats and ranking:

Ranking

# 2,050 ▲ 8

Other rankings

#220 in Web Development ▲ 1

#370 in Privacy & Security

#20 in chatgpt keyword 74

#23 in session keyword 51

#25 in mission keyword 7 ▲ 1

Upgrade to see more rankings

Other platforms

LightSession Pro for ChatGPT (v1.7.5)

6,000 4.15

(27)

For Developers

Monetize with App Pass Boost with Extension Booster

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:

Emil K

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/lightsession-for-chatgpt/

Email:

li*****@proton.me

Website:

https://github.com/11me/light-session

Permission Change History

2026-01-13: Version 1.6.1 → 1.6.2

Add Permissions: tabs

User Reviews

User reviews show strong support for LightSession Pro’s lag reduction and faster ChatGPT responses, with several calling it a life-saver for long chats. However, repeated issues include browser crashes, loss of chat messages, and privacy concerns around data collection. Additional reports of inconsistent functionality and settings not applying as advertised contribute to a mixed overall verdict. The extension appears highly beneficial when it runs stably but carries notable reliability and safety concerns.

Pros

Significant reduction in chat UI lag and faster response times across multiple reviews
Extension delivers the advertised performance improvements and generally works as expected when stable
Genuine improvement in long-chat usability and overall chat responsiveness (positive sentiment from several users)

Cons

Crashes the browser and causes stability issues in multiple reports
Messages can disappear or be lost, especially in long conversations
Privacy concerns: reports of malware, unknown data collection, and warnings about data safety
Occasional inconsistent functionality (retention/cropping settings not applying reliably; some users still experience UI lag or non-functional behavior)

Recent reviews

Meu chatGPT viviam causando crash no notebook, desde que instalei esta extensão isso foi totalmente resolvido. Cumpriu 100% do que prometeu e me permite preservar os recursos do computador para outras atividades. Maravilhosa mesmo, parabéns aos desenvolvedores!

by Ta*****, 2026-06-04

Very good works. Just one bug I have noticed that you might take into consideration (Github doesn't work for me right now): Whenever ChatGPT calls "plt.show()" when writing and executing python code, a graph should appear right below the message. I have noticed that the extention also trims those. Same for interacable graphs, but they should probably appear to the user. But, that aside, this is a really good extention and it is incredible that they do not do this in any sort of way automatically.

by Ma*****, 2026-05-28

Great add-on, thanks! I got no idea why OpenAI does not integrate this natively.

by Ru*****, 2026-04-10

View all user reviews ›

Is LightSession Pro for ChatGPT 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.

LightSession Pro for ChatGPT requires some sensitive permissions that could impact your browser and data security. 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.
Critical ******* ****** ** *** ********* ******** *********** ***********
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

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.

LightSession Pro for ChatGPT is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******