# Reddit (Au) Comment Highlights

> Highlight unread comments since your last visit to a Reddit comment section.

Canonical page: [https://chrome-stats.com/d/reddit-comment-highlights](https://chrome-stats.com/d/reddit-comment-highlights)

## Overview

- **ID:** `reddit-comment-highlights`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Easy
- **Category:** feeds-news-blogging,appearance,social-communication
- **Daily users:** 472
- **Weekly downloads:** 3
- **Rating:** 4.76 / 5 (17 ratings)
- **Version:** 3.0.0
- **Last updated:** 2024-07-01
- **First published:** 2017-12-20
- **Size:** 77 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/reddit-comment-highlights/)
- **Website:** [https://github.com/aesy/reddit-comment-highlights/issues](https://github.com/aesy/reddit-comment-highlights/issues)

## Description

Reddit (Au) Comment Highlights is a lightweight Chrome extension designed to help Reddit users easily identify unread comments since their last visit to any Reddit comment thread. This feature, typically exclusive to Reddit Gold users, is now accessible without premium subscriptions. The extension requires minimal permissions, ensuring user privacy, and seamlessly syncs across browser sessions for a consistent experience.

Supporting RES (Reddit Enhancement Suite) night mode and allowing custom CSS, the extension integrates smoothly with users' preferred Reddit browsing styles. Please note, comment highlights become visible starting from your second visit to a comment thread after installation. Enhance your Reddit browsing experience by never missing new discussions with this simple tool.

## Rankings

- #5,144 — Overall
- #292 — Feeds, News & Blogging
- #12 — comment
- #40 — highlighter
- #40 — reddit
- #73 — delight

## Permissions and access

### Permissions

- `storage`

### Host permissions

- `http://*.reddit.com/*`
- `https://*.reddit.com/*`

### Content script matches

- `*.reddit.com`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Request access to the following domains: reddit.com
- 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).

## Review summary

Users mostly praise the add-on for reliably highlighting comments and express strong appreciation. However, several reviewers report it stopped working for them or has compatibility issues, and night/dark-mode color detection is inconsistent across setups.

### Pros

- Generally works well and effectively highlights comments — multiple users say it "works great".
- Widely praised and appreciated — several reviewers give high ratings and thank the developer.
- Reported to work for users on common Reddit setups and some report success in dark mode/old.reddit.com.

### Cons

- Has stopped working for some users or after recent updates (version/Firefox compatibility problems).
- Night mode/dark mode color handling is inconsistent — may not detect night mode or apply correct highlight colors.
- Reliability is mixed across different Reddit layouts/environments (some users report it doesn't work).

## Similar extensions and apps

- [Hightlight new comments on Reddit](https://chrome-stats.com/d/new-comments-reddit) — 88 users, 5.00 / 5
- [Reddit Comment Hover](https://chrome-stats.com/d/reddit-comment-hover) — 13 users, 3.43 / 5
- [Companion for Reddit](https://chrome-stats.com/d/companion-reddit) — 43 users, 5.00 / 5
- [What's New, Reddit](https://chrome-stats.com/d/whats-new-reddit) — 4 users
- [Reddit Only Parent Comments](https://chrome-stats.com/d/reddit-only-parent-comments) — 1 users, 1.00 / 5
- [Reddit Unread Comments](https://chrome-stats.com/d/reddit-unread-comments) — 12 users, 5.00 / 5
- [Hacker News Comment Highlighter](https://chrome-stats.com/d/hacker-news-comment-highlight) — 6 users
- [Reddit Enhancer](https://chrome-stats.com/d/reddit-enhancer) — 2,966 users, 4.37 / 5
- [Reddit comment companion](https://chrome-stats.com/d/reddit-comment-companions) — 7 users, 5.00 / 5
- [Reddit Enhancement Suite V2](https://chrome-stats.com/d/reddit-enhancement-suite-v2) — 1 users
- [Reddit Rainbow](https://chrome-stats.com/d/reddit-rainbow) — 1 users
- [Blog Comment Highlighter](https://chrome-stats.com/d/blog-comment-highlighter)

---

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