changing Firefox addon sdk toolbarbutton icons at runtimes - firefox

Question

I'm using the toolbarbutton library, because the normal widgets would not store their positions if I restart Firefox.
Unfortunately I want to change the icon on runtime. With the widgets I did:
widget.contentURL = "http://127.0.0.1:8082/static/icons/eth_16.png";
With the toolbarbuttons I tried:
Toolbarbutton.image = "http://127.0.0.1:8082/static/icons/eth_16.png";
without any effect. The image seems to be only used when construction the toolbarbutton.
Also tried to destroy and recreate the button with a different icon, but that causes annoying flickering.
Any idea would be appreciated.

Answer 1

I did a quick test and this should work as expected so I'm not sure what issue you're running into here. Here's some example code that works just fine:
var toolbarbutton = require("toolbarbutton");
var timer = require("timer");
var TEST_ICON_M_URL = "http://www.mozilla.org/media/img/favicon.png";
var TEST_ICON_G_URL = "http://www.google.com//images/google_favicon_128.png";
console.log("TEST_ICON_URL", TEST_ICON_M_URL);
var options = {
id: "test-tbb",
label: "TEST BUTTON",
toolbarID: "nav-bar",
image: TEST_ICON_M_URL,
forceMove: true
};
var tbb = toolbarbutton.ToolbarButton(options);
tbb.moveTo(options);
timer.setTimeout(function () {
tbb.image = TEST_ICON_G_URL;
console.log("switched", TEST_ICON_G_URL);
}, 5 * 1000); // 5 seconds
Is there more code you could post? The problem must be somewhere else.