TabSource by _mr757_
Manage background browser audio streams, control active playback, and dynamically route individual tabs to specific hardware audio output devices.
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Extension Metadata
About this extension
TabSource is an in-browser audio manager/media matrix for Firefox modeled on SoundSource. Main Features • Route specific tabs: Dynamically route the audio stream from an specific tab (e.g. A streaming video, an music player) to any hardware sink connected to your computer (external speakers, a dac, headset, etc.) through the use of setSinkId • Transport control of media: Play, pause, mute, or seek through songs/tracks on any sound emitting tab directly from within the extension matrixpopup • Master Control: Mute or unmute all audio on every tab emitting sound through one single button. • Media Session Intercept: Get metadata from media in active tabs (title, artist) live and directly. It will not use network to make these requests-all audio processing happens completely on your system, nothing ever goes over the network.
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Permissions and data
Required permissions:
- Access browser tabs
- Access browser activity during navigation
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.0
- Size
- 14.03 KB
- Last updated
- a month ago (Jun 4, 2026)
- Related Categories
- License
- MIT License
- Version History
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