Hush: Tab Audio Control & Auto-Mute by RunLocalTools

Find the noisy tab. Mute everything else. Get your quiet back.

Ever had a video start playing from some tab you can't find? Or three tabs playing at once, with no idea which one is the culprit? Hush is a tab muter and tab audio manager for Firefox that stops that noise in one keystroke, or does it for you automatically.

ONE-KEYSTROKE CONTROL

Mute other tabs (Alt+M): The tab you're on keeps playing; every other tab goes quiet. Press again and everything comes back.

Mute all tabs (Alt+Shift+M): Silence the whole browser instantly. Great for calls, meetings, or when someone walks in.

Auto-follow (Alt+A): The sound follows you. Switch tabs and the tab you left is muted while the new one plays. Like a mute-background-tabs setting Firefox doesn't provide natively.

All shortcuts can be changed in Firefox's extension shortcut settings.

FIND WHICH TAB IS PLAYING SOUND

The toolbar badge shows how many tabs are making sound right now.

Open the popup to see "Playing now", a list of every tab producing audio.

"Played in the last 10 minutes" shows tabs that went quiet recently, so you can find that autoplay video or ad that made a noise and stopped.

Jump to any tab with one click, or mute or unmute a single tab right from the list.

The toolbar icon changes color with the mode (ready, following, others muted, all muted, paused), so you always know what Hush is doing.

SMART, RESPECTFUL BEHAVIOR

Restores exactly what it muted. Hush only unmutes tabs it muted itself. If you muted a tab manually, it stays muted.

Your manual choices win. Click mute or unmute on a tab and Hush won't fight you.

Grace delay: The tab you just left keeps playing for a moment (adjustable up to 5 seconds), so a song or video doesn't cut off mid-sentence when you glance at another tab.

Pinned tabs keep playing. Keep Spotify, YouTube Music, or a call tab pinned and Auto-Follow won't mute it.

Multi-window support. Choose whether each window keeps its own active tab audible, or only the window you're currently using.

Mute silent tabs too (optional): Pre-mute every background tab so nothing can burst in with autoplay audio, or only mute tabs that are actually making sound for a cleaner tab bar.

Put everything back undoes all of Hush's changes in one click.

Pause Hush stands down without uninstalling.

PRIVATE BY DESIGN

Hush is designed to run locally in your browser. No accounts, no analytics, no tracking, and no uploading your browsing activity.

Hush uses browser storage to remember your settings.

Tab titles are optional. Without the optional tabs permission, Hush shows generic labels like "Tab 3 in window 1" instead of reading page titles or addresses. Enable "Show tab names" only if you want actual titles in the list, and turn it off any time.

PERFECT FOR

Working with many tabs open: research, shopping, news, social media.

Stopping autoplay videos and ads from blasting sound.

Streamers, remote workers, students, and anyone in video calls.

Switching between YouTube, Spotify, Twitch, Netflix, and meetings without hunting for the right tab.

Anyone who wants one tab's audio at a time.

SETTINGS

Grace delay, per-window or focused-window scope, pinned-tab exemption, mute-silent-tabs behavior, toolbar badge visibility, and light, dark, or match-browser theme.

HOW TO USE

1. Install Hush and pin it to your toolbar.
2. Press Alt+M to mute every tab except the one you're on, or Alt+A to turn on Auto-Follow.
3. Open the popup to see what's playing, jump to a tab, or put everything back.

FAQ

Does Hush mute tabs I muted myself, then unmute them?

No. It only ever unmutes tabs it muted.

Does it collect data?

Hush is designed to keep its operation and settings local. It does not upload your browsing activity.

Does it reset when I restart Firefox?

Hush starts clean (mode off) and keeps your settings.