# OpusChange

> Annotate any web page by clicking its elements and export precise AI-ready instructions (CSS selectors, paths, styles). 100% local.

Canonical page: [https://chrome-stats.com/d/opuschange](https://chrome-stats.com/d/opuschange)

## Overview

- **ID:** `opuschange`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Opus
- **Category:** web-development
- **Daily users:** 1
- **Weekly downloads:** 1
- **Version:** 4.0.1
- **Last updated:** 2026-07-25
- **First published:** 2026-07-22
- **Size:** 71 KB
- **Data as of:** 2026-09-14
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/opuschange/)
- **Website:** [https://github.com/antoinebonpro/OpusChange/issues](https://github.com/antoinebonpro/OpusChange/issues)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/opuschange/privacy/](https://addons.mozilla.org/firefox/addon/opuschange/privacy/)

## Description

OpusChange turns visual feedback into instructions an AI coding assistant (Claude Code, ChatGPT, Copilot…) can execute precisely. Click any element, describe the change, and export selectors, DOM paths, styles and JS errors — 100% locally.

<strong>How it works</strong>
1. Click the OpusChange icon (or Alt+Shift+M)
2. Hover the page — elements highlight like the DevTools inspector
3. Click an element, pick a type (Edit · Add · Remove · Bug · Question) and write your comment
4. Copy the export and paste it into your AI assistant

<strong>What each annotation captures</strong>
- Unique CSS selector + full DOM path
- Section context, computed styles, attributes, HTML snippet

<strong>Built for iteration</strong>
- 3 export modes: Fix (strict repairs), Improve (the AI also suggests better), Audit (report only)
- JavaScript errors on the page are captured and included
- Mark annotations as resolved and re-export only what remains
- Annotations persist per URL; PNG capture with badges

<strong>Privacy</strong>: no account, no server, no network requests. Nothing leaves your browser unless you copy or download the export yourself. Interface in English and French.

## Rankings

- #122,011 — Overall
- #201 — exchange

## Permissions and access

### Permissions

- `storage`
- `clipboardWrite`
- `downloads`
- `<all_urls>`
- `file:///*`

### Content script matches

- `<all_urls>`
- ``

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/opuschange)