gistfile1.txt

var { ToggleButton } = require("sdk/ui/button/toggle");
var { ActionButton } = require("sdk/ui/button/action");

var toggleButton = ToggleButton({
  id: "my-toggle-button",
  label: "toggle-default",
  icon: {
    "16": "./firefox-16.png",
    "32": "./firefox-32.png"
  },
  onClick: updateToggleButtonLabelForThisWindow
});

var actionButton = ActionButton({
  id: "my-action-button",
  label: "action-default",
  icon: {
    "16": "./firefox-16.png",
    "32": "./firefox-32.png"
  },
  onClick: updateActionButtonLabelForThisWindow
});

function updateToggleButtonLabelForThisWindow(state) {
  toggleButton.state("window", {
    label: "window-specific label"
  });
}

function updateActionButtonLabelForThisWindow(state) {
  actionButton.state("window", {
    label: "window-specific label"
  });
}