Aby toś te dodanki wužywał, musyśo Firefox ześěgnuś.

Pśizjawiś
Dodankowy symbol

Pógódnośenja za Volume Control [Boost volume]

Volume Control [Boost volume] wót Chaython

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Pógódnośenja wót Wužywaŕ Firefox 10700314
wót Wužywaŕ Firefox 10700314, kolme vuotta sitten
Not only did it not boost the volume, it completely removed it. No matter where I slid it, up or down, it completely obliterated my laptop volume so I could hear nothing.

Wótegrono wuwijarja

jo se napisał kaksi vuotta sitten
Do you recall what site you were on? Yes it specifies it only works with HTML audio, this is to require less permissions.