Question

i’m developing a firefox addon. I’d like to change the colour of the current tab through my addon. How to do it??

Answer 1

You can place a .js file in your chrome/content folder and write a function like this:

// take a color and color the tab with it
setColor:function(tab, tabColor)
    {

    tab.style.setProperty('background-image','-moz-linear-gradient(rgba(255,255,255,.7),rgba('+tabColor+',.5),rgb('+tabColor+')),-moz-linear-gradient(rgb('+tabColor+'),rgb('+ tabColor+'))','important');

    }