Shimamura Lowpass by Shimamura3D
A plugin that muffles your audio
Extension Metadata
About this extension
Shimamura Lowpass
Open this file with firefox. I am working on a release for Opera but it's unlikely as Chromium-based browsers are super restrictive when it comes to the functions that this plugin provides.
Please note
If you do not plan on using it actively, I recommend disabling the plugin from the extensions manager in firefox: this plugin hijacks your default audio channel for firefox, creates 2 new audio channels in its place, and routes your audio between them. Sometimes it doesn't capture the audio source properly(depending on what the source is).
The plugin does not affect anything else about your computer, just routes Firefox's audio through a script.
It'll work on
It won't work on
etc
I recommend testing it on with your favorite music on youtube as a start, then slapping a video you have on your computer on firefox.
Open this file with firefox. I am working on a release for Opera but it's unlikely as Chromium-based browsers are super restrictive when it comes to the functions that this plugin provides.
Please note
If you do not plan on using it actively, I recommend disabling the plugin from the extensions manager in firefox: this plugin hijacks your default audio channel for firefox, creates 2 new audio channels in its place, and routes your audio between them. Sometimes it doesn't capture the audio source properly(depending on what the source is).
The plugin does not affect anything else about your computer, just routes Firefox's audio through a script.
It'll work on
- Local videos and audio saved on your PC that you open via drag-and-drop onto firefox
- Youtube
- Bilibili
- Mp4s all around the web!
It won't work on
- Any player that behaves as an image(with 'play' clickable on it) that turns into a video later; fluidplayer 3.17, for example, doesn't host videos on webpages, it hosts an image you click 'play on' and then runs a script to provide the video, and that's why it doesn't get captured properly by this plugin.
- Soundcloud(idk why)
- Mayhaps some websites you use that I don't 💗
etc
I recommend testing it on with your favorite music on youtube as a start, then slapping a video you have on your computer on firefox.
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Permissions and data
Required permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Version
- 1.0
- Size
- 45.09 KB
- Last updated
- 9 days ago (Nov 15, 2025)
- Related Categories
- License
- All Rights Reserved
- Version History
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