---
title: "Chrome Extension clipboardWrite: Copying answers without clipboard hijacking."
description: "Understand Chrome extension clipboardWrite permission vs clipboardRead. Learn how clipboard poisoning works and why Vezz me only writes what you explicitly click to copy."
canonical_url: "https://vezz.me/permissions/clipboardwrite/"
type: "pseo-permissions"
category: "permissions"
topic: "Clipboard Security Audit"
intent: "Best for users, security engineers, and developers auditing clipboard permissions in Chrome and Firefox extensions."
---

# Chrome Extension clipboardWrite: Copying answers without clipboard hijacking.

Understand Chrome extension clipboardWrite permission vs clipboardRead. Learn how clipboard poisoning works and why Vezz me only writes what you explicitly click to copy.

> **Best fit:** Best for users, security engineers, and developers auditing clipboard permissions in Chrome and Firefox extensions.

## Technical Permission Audit

- **Manifest Key:** `clipboardWrite`
- **Chrome Install Warning:** None (when invoked via user gesture) / Modify data you copy and paste
- **Risk Level:** Lower

```json
// manifest.json
{
  "name": "Vezz me — Selected Text AI Assistant",
  "permissions": [
    "activeTab",
    "storage"
    // Note: clipboardWrite is handled via navigator.clipboard.writeText in response to user click
  ]
}
```

### Legitimate Uses
- Copying AI explanations, Markdown tables, or code snippets to your clipboard when you click a 'Copy' button
- Exporting generated Anki flashcards directly to your clipboard for pasting into desktop Anki
- Copying formatted citations or formulas with one click

### Red Flags to Watch For
- Replacing crypto wallet addresses (cryptojacking clipboard clippers) when users copy Bitcoin or Ethereum hashes
- Silently overwriting copied terminal commands with malicious bash commands containing trailing newlines
- Writing to clipboard in background intervals without any user click gesture

**How Vezz me handles this:** Vezz me never modifies your clipboard in the background. It uses standard web `navigator.clipboard.writeText()` strictly inside the extension popup when you explicitly click the 'Copy Answer', 'Copy Code', or 'Copy Preset' button.

## Step-by-step workflow

1. **Distinguish clipboardRead from clipboardWrite**: `clipboardRead` lets an extension silently spy on passwords or private tokens you copy. `clipboardWrite` merely allows writing to the clipboard when you click a button.
2. **Watch out for clipboard poisoning and cryptojacking**: Malicious extensions monitor for copied crypto addresses or shell commands and silently swap them. Never install untrusted extensions requesting unrestricted clipboard access.
3. **Verify user-gesture-only copying**: Vezz me only writes to your clipboard when you physically click a 'Copy' button in the popup interface.

## Why clipboardRead is high risk and clipboardWrite is low risk

Reading your clipboard exposes passwords from password managers and 2FA recovery codes. Writing to clipboard on user gesture is standard web application behavior.

- `clipboardRead` exposes everything you copy: SSH keys, private messages, credit card numbers
- Vezz me NEVER declares `clipboardRead`—it cannot see what is on your system clipboard
- `clipboardWrite` is used strictly to deliver clean Markdown answers, prompt presets, and Anki cards when you click copy

## Clipboard Permissions Comparison

Comparing clipboardRead vs clipboardWrite.

| Permission | Can Read Copied Passwords? | User Benefit |
| --- | --- | --- |
| clipboardRead | Yes (reads all copied system text) | Auto-pasting text without pressing Ctrl+V |
| clipboardWrite (on user click) | No (write-only) | 1-click copy buttons for code and Markdown tables |
| Vezz me Implementation | No clipboardRead; writes only when you click 'Copy' | Zero passive clipboard spying risk |

## Frequently asked questions

### Can Vezz me see passwords I copy from 1Password or Bitwarden?

Never. Vezz me does not have the `clipboardRead` permission. It is technically impossible for Vezz me to access your system clipboard contents.

### Why does Vezz me have a Copy button in the popup?

To make it effortless to copy generated code snippets, Markdown tables, or Anki cards directly into your local IDE, Notion, or Anki app.

### Where can I read about clipboardRead risks?

See our technical audit: Chrome Extension clipboardRead Permission Security.

## Related guides

- [clipboardRead Permission Security Audit](https://vezz.me/permissions/clipboardread/): Why clipboard reading requires extreme caution.
- [activeTab Permission Security Guide](https://vezz.me/permissions/activetab/): How user gestures guarantee extension privacy.
- [AI Chrome Extension Privacy Checklist](https://vezz.me/blog/ai-chrome-extension-privacy-checklist/): Essential security checklist before installing extensions.
- [Banking & Financial Sites Permission Audit](https://vezz.me/permissions/banking-and-financial-sites/): Why financial sites require strict clipboard isolation.