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Cory - Your AI Browser Companion

Complete Documentation

Version: 2.0.2
Last Updated: November 17, 2025

Table of Contents

  1. Introduction
  2. Installation and Setup
  3. Getting Started
  4. Two Modes: Chat vs Co-Writer
  5. Chat Mode
  6. Co-Writer or Editor Mode
  7. Preset Prompts
  8. Local Memory System
  9. Context Options
  10. Settings and Configuration
  11. Privacy and Security
  12. Troubleshooting
  13. FAQ

Introduction

Cory is your AI-powered browser companion that helps you interact with web content in two powerful ways:

  1. Chat with any webpage - Ask questions, get summaries, analyze content
  2. Rewrite selected text - Get four AI variations of any text you select

What Makes Cory Special

Cory offers 100% local privacy with all conversations and memories stored only in your browser. It provides visual understanding by analyzing both screenshots and text content of pages. The local memory feature remembers your preferences and personal context across sessions. With its dual modes, you get Chat mode for analysis and Co-Writer mode for text editing. Best of all, there's no subscription needed, just bring your own OpenAI API key.

Installation and Setup

Requirements

You'll need the latest version of Chrome or Edge browser, an OpenAI API account, and an active OpenAI API key.

Installation

  1. Install Cory from the Chrome Web Store
  2. The first time you click Cory, you'll be prompted for your API key
  3. Enter your OpenAI API key and save
  4. Start using Cory

Initial Configuration

Right-click Cory icon → Options to access settings where you can configure your API Key, Chat Model for conversational analysis, and Co-Writer Model for text rewriting.

Recommended Models: GPT-4.1 offers a strong balance of performance and cost. GPT-5.1 has the best capabilities but is more expensive. GPT-5 Mini and Nano provide faster, cheaper options.

Getting Started

Three Ways to Use Cory

1. Floating Icon

Look for Cory's icon in the top-right corner of any webpage. Click it to open the chat interface and start asking questions or analyzing the page.

2. Text Selection

Select any text on a webpage, then right-click and choose "Ask Cory" to get four rewrite variations or ask questions about the text.

3. Keyboard Shortcuts in Chat

Use Enter to send messages, Shift+Enter for new lines, Up and Down to navigate through previous prompts, and Esc to close Cory.

Two Modes: Chat vs Co-Writer

Cory has two distinct modes that you can switch between using the toggle switch in the header.

Chat Mode

Purpose: Analyze and understand web content.

Best for: Asking questions about pages, getting summaries and explanations, multi-turn conversations, and page analysis with screenshots.

Features: Includes conversation history, screenshot and text analysis, local memory integration, streaming responses, and a New Chat button to start fresh.

Co-Writer or Editor Mode

Purpose: Rewrite and transform selected text.

Best for: Getting multiple text variations, rewriting in different styles, and quick text transformation workflows.

Features: Shows selected text preview, generates four variations per prompt, provides diff highlighting, enables one-click paste or copy, and includes a custom prompts library.

Chat Mode

How It Works

  1. Open Cory
  2. Type your question or request
  3. Cory analyzes the screenshot, page text, local memory if enabled, and selected text if any
  4. Get streaming AI responses
  5. Continue the conversation with preserved context

Example Questions

Page Analysis: Try asking "What is this page about?", "Summarize the main points", or "Is there contact information on this page?"

Content Understanding: Ask Cory to "Explain this in simpler terms", "What are the pros and cons mentioned?", or "Are there any red flags in this contract?"

With Selected Text: Select text first, then try "Translate this to Spanish", "What does this technical jargon mean?", or "Find errors in this text".

Co-Writer or Editor Mode

How It Works

  1. Select text on any webpage, or start from clipboard content
  2. Open Cory and switch to Co-Writer mode
  3. Review your selected text in the preview area
  4. Enter a prompt or choose from preset prompts
  5. Get four AI-generated variations
  6. Click an option to paste it, or use Copy

Example Workflows

Quick Rewriting: Select a sentence, type "Make this more professional", compare the four options, and choose your favorite.

Style Changes: Try prompts like "Make this casual", "Shorter version", or "More detailed".

Specific Edits: Ask Cory to "Fix grammar", "Use active voice", "Remove jargon", or "Add transition words".

Preset Prompts

Cory includes built-in prompts for common tasks. Access them by clicking the preset buttons or from the prompts list.

Available Presets

  • Summarize
  • Extract Main Bulletpoints
  • ELI5
  • Fact Checker
  • List Pros and Cons
  • Check Grammar
  • Word Cloud
  • Analyze Contract
  • Tell a Joke
  • Fill Out Form (Beta)

Example Custom Prompts

Convert to LinkedIn post with 3 key insights
Extract all dates, names, and locations
Translate to another language while maintaining tone
Create study guide with key terms
Identify all statistics and sources
Rewrite as a Twitter thread

Local Memory System

Local Memory lets Cory remember information about you across conversations, completely locally in your browser.

What is Local Memory?

It is a place to store personal context that Cory can reference, such as your name and preferences, work context and role, dietary restrictions, writing style preferences, or recurring tasks.

How to Use It

  1. Click the settings icon in Cory's chat interface
  2. Select Edit Local Memory
  3. Type or paste your context
  4. Save

Reminder: Do not include sensitive data such as passwords, card details, or other private credentials.

Context Options

Control what information Cory can see using the checkboxes below the input field.

Screenshot

What: Captures the visible portion of the webpage.
Used for: Visual analysis, layout understanding, and image-aware questions.
Disable when: You have privacy concerns or want to reduce cost.

Page Text

What: Extracts text content from the HTML.
Used for: Reading articles, finding information, and text analysis.
Disable when: You only want screenshot context or the page contains too much text.

Local Memory

What: Includes your personal context from Local Memory.
Used for: Personalized responses and consistent behavior.
Disable when: You are asking general questions unrelated to your context.

Settings and Configuration

Access settings by right-clicking the Cory icon and choosing Options.

API Key

Required: OpenAI API key.
Where to get it: platform.openai.com/api-keys
Storage: Stored in browser-managed local storage.

Model Selection

Chat Model: Pick from GPT-4.1, GPT-5.1, GPT-5 Mini, GPT-5 Nano, or GPT-4o depending on your cost and quality needs.

Co-Writer Model: Uses the same model options and can be configured separately from Chat.

Privacy and Security

What Stays Local

Conversation history, Local Memory, custom prompts, settings, preferences, and your stored API key remain in the browser environment.

What Gets Sent to OpenAI

Prompts and questions, screenshots when enabled, page text when enabled, local memory when enabled, and selected text are sent directly to OpenAI for processing.

Best Practices

  1. Never share your API key
  2. Do not put sensitive data in Local Memory
  3. Be cautious with private pages such as banking or medical records
  4. Uncheck context options when needed
  5. Monitor API usage in the OpenAI dashboard

Troubleshooting

Cory Icon Not Appearing

  1. Wait a moment or refresh the page
  2. Make sure the extension is enabled
  3. Some browser-internal pages block extensions
  4. Try disabling conflicting extensions temporarily

API Key Issues

If you see authentication or quota errors, verify the key, confirm billing on your OpenAI account, and check your usage limits.

No Response or Freezing

  1. Check your internet connection
  2. Give large pages more time
  3. Try a smaller text selection
  4. Disable screenshot for faster responses
  5. Check the browser console for errors

FAQ

Is Cory free?
The extension is free. You pay OpenAI directly for API usage.

Does Cory work on all websites?
It works on most normal sites, but browser-internal pages like chrome:// and edge:// block extensions.

Can Cory analyze PDFs?
Yes, if the PDF is displayed in the browser and selectable or visually interpretable.

Does Cory support multiple languages?
Yes. OpenAI models support many languages for both chat and rewriting.

Can I use Cory on mobile?
Not currently. It is built for desktop Chrome and Edge.

Support

Feedback and Bug Reports: Submit feedback here

Contact: Visit pro-writer.de for current support details.

Legal: View the local standalone Privacy Policy, Terms of Service, and Impressum.

Version: 2.0.2
Last Updated: November 17, 2025