Great add-on. Some films on streaming format were just too low volume to watch on my laptop. 600% Sound Volume was a game changer and made streaming videos a real pleasure.

This is definitely the only such add-on that does what I want it to do. Thank you, Aliaksandr!

I love this and it works nice! One minor problem though: on Youtube, when I use it, videos will only play on 1x speed, neither faster nor slower work anymore. (2021) ... Three years later (2024), I still use it on a daily. Greatly recommended.

Great! Just great!

Все отлично, но на некоторых сайтах вызывает ошибку «Html5 video file not found», пришлось отказаться от этого дополнения.
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Everything is great, but on some sites it causes the error "Html5 video file not found", I had to abandon this addon. = (

Suddenly this extension is causing cross-site origin issues. Sketchy.

best volume booster out there , used something on every browser , but the combined force of firefox and you made it good , before I had to plug in so that the audio does not distort , but here it's perfect either way

Even though it works very well, somehow it causes error #4000 on twitch. Bummer

Breaks twitch videos and I am unable to change playback speed while this is enabled. Otherwise, it is a great extension that has helped out a lot.

Update: It now works exactly how I hoped, and I can change the speed of videos and it works. Changed my rating from 4/5 to 5/5

Amazing add-on. I use it all of the time. Recently it won't let me speed up YouTube videos while I have this add-on enabled which kinda sucks. Before it would just not let me speed it up if this add-on was in use, but now I have to fully disable it from Firefox to speed up the videos.

This plugin completely destroys slowmo playbacks for me (for example: 0.5 or 0.75 speed on Youtube).

Recent Update seems to have broken the ability to watch a lot of videos.

Works great except for the past week, it's caused twitch clips to not load.

Edit: Addon is fixed and works great.

This app really works unlike a lot of other app simple to use unlike other apps.

Worked great until the update about a week ago, now I can't watch twitch clips with it enabled so I have to keep turning it on and off

works well. but it doesnt let you play videos on different playback speed (even you are not using the extension). Uninstalled.

After the latest update,
youtube payback speed not working.
(I checked by enable-disable this extension)