To use these add-ons, you'll need to download Firefox.

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Iceggiren i Audio Equalizer

Audio Equalizer sɣur Muyor

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Icegger-it Dribbles88
sɣur Dribbles88, 6 år sidan
Exactly what I needed, working on firefox 66.0.3 and only requires a refresh of the youtube page if you already had a video playing at the time of installation. PERFECT!!