ChatGPTBox integrates ChatGPT into a browser through an extension with additional site interactions.
Open source
24 alternativesLightSession
LightSession trims the page structure in long ChatGPT conversations through a Firefox or Chrome extension.
About LightSession
LightSession is an open-source browser extension for Firefox and Chrome that reduces lag in long ChatGPT conversations. Long threads keep every message in the page, which can make scrolling, typing, and developer tools slow. The extension intercepts API responses and trims conversation data before the page renders it, so only the most recent messages stay visible in the browser. According to the project's homepage, the conversation stored on OpenAI's side remains intact and the model context is not reduced.
The extension runs only on chat.openai.com and chatgpt.com. Trimming can be reversed by refreshing the page or using the Refresh button in the popup. The Ultra Lean Mode, which applies aggressive CSS optimizations, is labeled experimental. The homepage states that the extension makes zero network requests, stores its settings only in browser.storage.local, and includes no telemetry. Installation from the Firefox Add-ons site or the Chrome Web Store involves those external services.
Key features
- Intercepts API responses and trims conversation data before React renders it
- Keeps only the last N messages visible, configurable from 1 to 100
- Counts messages by role rather than by individual page nodes
- Optional on-page status pill showing trim statistics
- Experimental Ultra Lean Mode that disables animations and applies CSS containment
- Restores the full conversation by refreshing the page
Best for: People who keep very long ChatGPT conversations, such as developers using it for debugging, code reviews, or long refactors, and who find the browser tab slow as the thread grows.
Good for
- Open source, with the code published in a public GitHub repository
- The homepage states that it makes no network requests and includes no telemetry
- Trimming affects only the displayed page, and the homepage states that model context is not reduced
Watch out for
- Works only on chat.openai.com and chatgpt.com
- Ultra Lean Mode is marked as experimental
LightSession at a glance
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
LightSession alternatives
Tools and sites you could use instead, ranked by how closely they match.
GPThemes customizes the ChatGPT interface in Chrome and Firefox with color, font, and design settings.
Page Assist connects locally running AI models to web browsing through a browser assistant.
Open source
24 alternatives
This list tracks front-end GUI clients for ChatGPT, Claude, and other language models.
PaidOpen source
24 alternatives
This repository curates ChatGPT tools, applications, and other resources related to the OpenAI chatbot.
Open source
24 alternatives
Awesome ChatGPT collects tools, demos, and documentation related to ChatGPT and GPT-3.
Popular in AI Directories & Resources
Well-known listings from the same topic.
getdesign.mdgetdesign.mdfuturepediafuturepedia.ioAwesomeclaudeawesomeclaude.aiLLM Explorerllm-explorer.comAI Depotaidepot.coAI Valleyaivalley.ai
LightSession FAQ
Does this reduce the model's context?
According to the homepage, no. LightSession trims only the DOM, which is what the browser renders. The conversation on OpenAI's servers remains intact.
How do I see the full conversation history again?
Click Refresh in the extension popup, or reload the ChatGPT page.
Which websites does the extension run on?
It runs only on chat.openai.com and chatgpt.com.
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.