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Preview of 600% Sound Booster (Fixed)

600% Sound Booster (Fixed) by LEFRIEND

Up to 600% volume boost. A remaster of the remaster of a dead add-on.

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Screenshots
boosting soundcloud tab to 290% its normal volume.
About this extension
This add-on was originally deleted because it contained malicious code. After it got taken down, someone remade it, and made it open-source. However, said version didn't really work with websites such as soundcloud due to server limitations.

This version fixes that issue, being able to boost any audio from any website!

Shoutout: https://addons.mozilla.org/en-US/firefox/addon/600-sound-volume-privacy/
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Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Add-on Links
  • Support Email
Version
1.5.4
Size
114.06 KB
Last updated
8 days ago (Mar 13, 2026)
Related Categories
  • Photos, Music & Videos
  • Tabs
  • Games & Entertainment
License
GNU General Public License v3.0 only
Version History
  • See all versions
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