It only works on limited sites.

Missing functionality, doesn't work (Reported to firefox)

Doesn't work at all on any tab.

Doesn't work at all for me

it sets volume to 100% every time i restart firefox; useless for me

always wanting more from you

Does not seem to do anything.

I don't know if this extension is broken or not, or restricted to only a few sites because on the radio website I use, it does not work at all.

Does nothing in Scrimba tabs

I reviewed the code and this contains UNWANTED ADS INJECTED. Specifically targets aliexpress. The addon author has multiple aliexpress addons. This is clearly intentional. It also seems like it may have tracking via that injection. DO NOT USE.

it does noting at all

Like another user mentioned, if you are using a CMS with TinyMCE this addon will inject a spam code while active. Stay well clear.

Injects spam code without user approval. Also hijacks the standard "paste without formatting" shortcut, ctrl+shift+v. Injects a script into every single TinyMCE editor in WordPress while the extension is active, meaning this extension is adding code which is then saved to your website itself. I had to go through every website I'd worked on while the extension was active, checking every page and removing the added script code from each.

It actually does not work. I observed no changes in my audio volume levels on my Mac

Using this Add-on breaks Hulu auto play and going to another episode without refreshing the page. Gives error p-dev302.