There are many similar extensions.
This is the only one that does not require permission to "access your data for all websites".

UI could be improved though. Volume should default to 100 instead of 10, and I would like to hide the 3D spatialization features.

Used to love this app but the most recent update (either of Firefox or the extension, unsure) broke it. It will randomly set the volume of a tab to 0 (even when the extension is disabled! don't know how that works) and the volume slider doesn't work anymore. Would totally come back to this app if the problems were resolved because this did everything I needed it to before

using for firefox extension, where I needed an easy access Balance slider for right-left adjust. Sound Adjuster did nothing to vary the balance. I deleted it.

Works fine, but UI isn't comfy for me, hope to see:
1) area/button to set the input range slider to default position (for e.g. by click on %Name or %Value).
2) markings with 25% 50% 75% (e.g. datalist with option)
3) hide unwanted stuff (e.g. 3D Audio) by options or collapse element (e.g. div display:none/block with :checked)
4) set step to 1 or 5 instead of 0.01 (for input type="range", since 100-10000 values is too precise and redundant). Clicking on min/max number move slider with 5 steps (e.g by 20% when 100%)

Thanks for extension!

Great experience with that one. First thing first: you can adjust every tab to your liking. One is too loud but you don't want to close or silence it? Use "Amplify" and set it to 101% and you can't really hear it anymore. A video is generally way to silent? "Amplify" full throttle and Volume between 30-40 for a normal experience. Keep in mind that not all Website (reddit) support that extension, but that isn't because OF the extension but because of reddit/the Webiste.

OBVIOUSLY if you close a tab or the Browser, it sets back to the default, because you are also closing the tabs that you adjusted. Please keep in mind that it makes sense as every tab is adjusted separately.

i saw asmongold use it and i downloaded too

Not working on Firefox 128 "Installation aborted because the add-on appears to be corrupt." error

saw asmongold using this so I got it for myself

This often re-sets itself back to zero!

asmongold brought me here

no effect

Exactly what i was looking for, balance audio either left or right channel for each tab. Works great.

THIS is the best if you need to AMPLIFY your volume above 100% !

Doesn't work at all for me 😥

works perfectly for my needs, without those suspicious permissions required for all the other volume control addons

Good idea but doesn't work on most tabs. Even after refreshing the page, the add-on doesn't apply to the page.

Worked sometimes but has given up the ghost and virtually mutes the sound now.