code: function getVendorsList() {
  		var allVendors = Object.keys(vendorsDB);
  		var vendors = prefs.getArray('caniuse.vendors');
  		if (!vendors || vendors[0] == 'all') {
  			return allVendors;
  		}
  
  		return intersection(allVendors, vendors);
  	}
docs: Returs list of supported vendors, depending on user preferences
  @return {Array}