Mattermost Active Thread Highlighter

Name: Mattermost Active Thread Highlighter
Rating: 5 (2 reviews)
Author: Alexander Karpov

Highlights the active thread's root post in the center channel

As of June 2026, Mattermost Active Thread Highlighter has 7 users and a 5.00/5 rating from 2 reviews in the Workflow & Planning category.

Alexander Karpov Workflow & Planning

Chrome Web Store ↗.crx

Users+600.0%

Rating0%

5.00

2 reviews

Reviews+100.0%

Version

1.2

Manifest V3

History

6 snapshots

Tracking since Apr 20, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 20, 2026	1	5.00	1	1.2
Apr 25, 2026	3	5.00	2	1.2
May 2, 2026	3	5.00	2	1.2
May 9, 2026	2	5.00	2	1.2
May 13, 2026	4	5.00	2	1.2
Jun 2, 2026	6	5.00	2	1.2
Now	7	5.00	2	1.2

Permissions & access

Permissions: storagescripting
Host access: https://*/*

Screenshots

Mattermost Active Thread Highlighter screenshot 1

Mattermost Active Thread Highlighter screenshot 2

About

Visually highlights the root message of the currently open thread in the center channel. Never lose track of which conversation you're reading.

Features

- Active thread highlighting — when you open a thread in the right-hand sidebar, its root post in the center channel gets a subtle amber border and background overlay
- Configurable domain — works on any self-hosted Mattermost instance, just enter your domain in the popup
- Instant detection — uses MutationObserver for immediate reaction to thread changes, with interval polling as fallback
- Zero reload apply — changing settings takes effect immediately without page refresh
- Lightweight — no external dependencies, minimal DOM footprint, pointer-events passthrough

Fixes:
- Fixed thread highlight appearing with a ~5 second delay after page load for Chrome Web Store users
- Improved extension responsiveness by optimizing how DOM changes are detected
- Fixed extension not working after browser restart without reopening settings