Pfthb

I recently wrote a personal Firefox addon which lowers the sound volume of the first video element found in a webpage using a very simple and generic code attached to a button so I can automatically lower the volume to the value of 0.003 whenever I want to

This is the code that I used in my addon:

 function lower_volume() 
 document.getElementsByTagName("video")[0].volume = 0.004;
 

The approach was successful on many websites including YouTube but I faced a small problem that a function that resides in YouTube's base.js :g.h.setVolume=function(a)XI();this.o.volume=a; gets called after a specific amount of time which in its turn sets the volume of the video element to the value of the volume slider and that's something I don't want to happen.

I wonder if there is a way to redefine the function g.h.setVolume that resides in base.js into something like g.h.setVolume=function(a); ?

I already tried to use

document.getElementsByTagName("video")[0].onvolumechange = lower_volume;

In order to lower the volume once again as soon as the function setVolume changes the volume value and the approach was successful but the new volume is heard for a tenth of a second which is a bit annoying sometimes. That's why I want to know if there is any code that I can write to redefine the function g.h.setVolume completely.

I know that what I am asking might seem a bit silly and kind of impractical and there are many other ways to accomplish what I am trying to do in a better way, but since my addon is just for personal use, I just want to know if there is a possible way that enables me to redefine the g.h.setVolume function.

This link contains the complete code of base.js

I am still a beginner in JavaScript and any help is much appreciated!