rem: set friendsOnly(aVal) 
add: set visible(aVal) 
context:   set friendsOnly(aVal)  {    this.mFO = aVal;    return this.mFO;  }
meta: 760	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/760/907ccefd0319408363a8b256a14e87030a61f914/functions.js/clean/chrome/content/functions.js