Mattermost Active Thread Highlighter

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