# Overlay Diff Reader

> See textual differences inside an overlay panel.

Canonical page: [https://chrome-stats.com/d/overlay-diff-reader?hl=ja](https://chrome-stats.com/d/overlay-diff-reader?hl=ja)

## Overview

- **ID:** `overlay-diff-reader`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Leila
- **Category:** feeds-news-blogging
- **Daily users:** 1
- **Version:** 1.0
- **Last updated:** 2025-10-25
- **First published:** 2025-10-22
- **Size:** 18 KB
- **Data as of:** 2026-09-22
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/overlay-diff-reader/)

## Description

Overlay Diff Reader highlights changes in wording, sentence structure, or phrasing between two selections. Useful for copy editing or academic review.

## Rankings

- #128,110 — Overall
- #74 — overlay

## Permissions and access

### Permissions

- `contextMenus`
- `scripting`
- `activeTab`
- `storage`

### Host permissions

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate 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).

## Similar extensions and apps

- [Visual Diff Overlay](https://chrome-stats.com/d/visual-diff-overlay)
- [Comparison Overlay Highlighter](https://chrome-stats.com/d/comparison-overlay-highlighter)
- [Smart Overlay Diff Exporter](https://chrome-stats.com/d/smart-overlay-diff-exporter)
- [Compact Comparison Overlay](https://chrome-stats.com/d/compact-comparison-overlay)
- [Smart Overlay Toggle View](https://chrome-stats.com/d/smart-overlay-toggle-view)
- [Comparison Overlay Notes](https://chrome-stats.com/d/comparison-overlay-notes)
- [Dual Text Viewer](https://chrome-stats.com/d/dual-text-viewer)
- [Smart Revision Comparator](https://chrome-stats.com/d/smart-revision-comparator)
- [Diff Viewer](https://chrome-stats.com/d/diffviewer) — 5 users
- [Diff Viewer](https://chrome-stats.com/d/diff_viewer) — 5 users
- [Simple Compare Tool](https://chrome-stats.com/d/simple-compare-tool) — 1 users
- [Diff Viewer](https://chrome-stats.com/d/diff-viewer) — 29 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/overlay-diff-reader?hl=ja)