ChatGPT Context Window Meter

Name: ChatGPT Context Window Meter
Author: Expsy

By: Expsy Add-on

Shows an estimated ChatGPT conversation context window usage meter inside the page.

Overview

Firefox Add-ons Store

Daily users

5 ▲ 2

Data as of 2026-09-06

Version:

0.1.0

Last updated: 2026-04-18

Features & Capabilities

ChatGPT Context Window Meter adds a small in-page meter to chatgpt.com and chat.openai.com.

It estimates how much of the current conversation context window is being used based on the visible conversation text and the current draft message. The add-on is intended to help decide when a thread is getting crowded and when it may be better to start a new chat.

Features:

Estimated context usage percentage
Linear meter in full view
Minimized circular meter mode
Adjustable assumed context window size
Adjustable reply buffer
Runs entirely in the page as a lightweight content script

Important note: This add-on does not use any private OpenAI API or hidden token counter. The displayed value is an estimate based on visible page content and simple token heuristics, so it should be treated as guidance rather than an official token count.

User Growth & Download Statistics

Add-on

By:

Expsy

Daily users:

5 2

Version:

0.1.0 Last updated: 2026-04-18

Version code:

6222683

Creation date:

2026-04-15

Firefox add-on GUID:

chatgpt-context-window-meter@example.com

Firefox add-on numeric ID:

3001857

Weekly download count:

Firefox on Android:

Risk:

Permissions:

storage

Content scripts matches:

chatgpt.com
chat.openai.com

Size:

15.12KB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-06

Compare stats and ranking:

Ranking

# 46,291 ▲ 10,933

Other rankings

#148 in context menu keyword 11 ▲ 58#227 in chatgpt keyword 83 ▲

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:

Expsy

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/chatgpt-context-window-meter/

Is ChatGPT Context Window Meter 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.

ChatGPT Context Window Meter requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: chatgpt.com, openai.com
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.

ChatGPT Context Window Meter may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood analysis details

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