# How to change the volume of one tab in Firefox

By Sheik Ahamed, who makes Earmix. Checked on 12 November 2026.

<strong>Short answer:</strong> Firefox has no volume control for a single tab. It can only mute one, with the speaker icon on the tab or Ctrl+M. To turn a tab down and leave the others alone, use the video player's own volume, or a tab volume add-on such as Earmix Tabs, which is free and which we make.

## Mute a tab in Firefox

Firefox shows a speaker icon on any tab that's playing sound.

1. Click the speaker icon on the tab to mute it. Click it again to bring the sound back.
2. Or select the tab and press **Ctrl+M** (**Control+M** on a Mac).

A muted tab keeps playing; you just can't hear it. That's on or off. Firefox has no setting for half volume.

## Use the player's own volume

Most video sites, such as YouTube, have a volume slider in the player. It only changes that page, so it works as a rough volume control for one tab. It doesn't help with sites that have no player control, or with ads and clips that start on their own.

## Add a volume slider for each tab

Earmix Tabs is a free Firefox add-on. Its toolbar button lists every tab that's playing sound, each with its own volume slider and mute button.

1. Open [Earmix Tabs on Firefox Add-ons](https://addons.mozilla.org/firefox/addon/earmix-tabs/) and choose **Add to Firefox**.
2. Play something in a tab.
3. Click the Earmix Tabs button in the toolbar and drag that tab's slider.

It changes the sound inside the page, on your computer. Nothing is uploaded, and Firefox doesn't show a "sharing" indicator while you use it.

It's an ordinary Firefox add-on, so it works on its own in Firefox on Mac, Windows and Linux. You don't need to buy anything.

## Lower other tabs during a call

From version 0.3.0, Earmix Tabs can turn your other tabs down while one tab is on a call. When a tab uses the microphone, as Google Meet, Zoom and Teams do in the browser, the other Firefox tabs drop to 30% and come back when the call ends. The call tab stays at full volume.

You can change the level, or turn this off, in the add-on's popup. To know a call is on, the add-on only notices that a page is using the microphone. It never hears or records it.

## What it can't do in Firefox

- **No boost past 100%.** In Chrome and other Chrome-based browsers, Earmix Tabs can push a quiet tab up to 400%. Firefox doesn't let an add-on capture a tab's sound, so in Firefox the slider stops at 100%.
- **No EQ for a tab, and no recording of one tab,** for the same reason.

If a Firefox tab is too quiet at 100% and you're on a Mac, boost Firefox as a whole instead. See [Mac volume too low](https://earmix.app/mac-volume-too-low.html).

## With Earmix on a Mac

Earmix is our volume mixer for the Mac's menu bar. With it installed, your Firefox tabs show up in its mixer under Firefox, next to your other apps, so you can set a tab without opening the browser.

![Earmix's mixer, with browser tabs listed under their browser](https://earmix.app/img/mixer-light-1x.png "Tabs appear under their browser, each with its own slider.")

Earmix can also boost or record Firefox as one app, which covers the two things the add-on can't do there. See [how to control the volume per app on a Mac](https://earmix.app/per-app-volume-mac.html), or [how to change tab volume in Chrome and Safari](https://earmix.app/browser-tab-volume.html).

## Which to use

| | Mute a tab | Volume per tab | Boost past 100% |
|---|---|---|---|
| Firefox alone | Yes, speaker icon or Ctrl+M | No | No |
| The player's slider | On sites that have one | On sites that have one | No |
| **Earmix Tabs** | Yes | Yes | Not in Firefox |

If muting is enough, Firefox's speaker icon does it. If you want a quiet video in one tab and a loud call in another, you need a slider per tab.

## Questions

### Does Firefox have a volume mixer for tabs?

No. Firefox can mute a tab with the speaker icon or Ctrl+M, but it has no volume slider per tab. An add-on such as Earmix Tabs adds one.

### How do I lower the volume of one tab in Firefox?

Use the volume slider in the page's video player if it has one. Otherwise install a tab volume add-on such as Earmix Tabs, click its toolbar button and drag that tab's slider.

### What is the shortcut to mute a tab in Firefox?

Ctrl+M, or Control+M on a Mac, mutes and unmutes the selected tab. You can also click the speaker icon on the tab.

### Can I boost a Firefox tab above 100%?

Not with Earmix Tabs. Firefox doesn't let add-ons capture a tab's sound, so the slider stops at 100%. On a Mac, Earmix can boost Firefox as a whole app instead.

### Is Earmix Tabs free?

Yes. The add-on is free and works without Earmix. Earmix for Mac is a separate paid app that also shows your tabs in its mixer.

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Earmix gives every Mac app and browser tab its own volume, output and EQ. $12.99 once (early bird, regularly $49), with a 14-day money-back guarantee. https://earmix.app/