Pour utiliser les extensions Android, vous aurez besoin de Firefox pour Android. Pour découvrir les modules complémentaires pour Firefox, veuillez visiter cette page.
I initially thought that I can only set the speed for all the tabs. After reading the description, and digging around a bit, now I have realized that I can set the speed only for one tab(as I only need it for spotify) which is really good, this extension is exactly what I needed
