Button can now have a tooltip

README.md

@@ -26,6 +26,7 @@ The UrlbarButton module allows for easy adding of buttons to the urlbar in Firef
 
 * **id** - a string identifier that identifies the specific button.
 * **image** - a path to an image for the button. (optional)
+* **tooltip** - a tooltip text for the button. (optional)
 * **onClick** - a callback to fire on a click on the button. (optional)
 
 ### Option syntax: onClick
@@ -61,6 +62,7 @@ Follow the Add-on SDK's documentation for [third party packages](https://addons.
 * Changed `setImage` and `setVisibility` to have the href-parameter as the last parameter instead of the first as that makes more sense for an optional parameter.
 * Changed `setVisibility` to have its href parameter be optional for real
 * Added new `getVisibility` method
+* Button can now have a tooltip
 
 ### 0.3.0
 

docs/urlbarbutton.md

@@ -29,6 +29,9 @@ Creates a urlbarbutton.
 @prop [image] {String}
 	A url to an image for the urlbar button.
 
+@prop [tooltip] {String}
+	A tooltip for the urlbar button.
+
 @prop [onClick] {Function}
 	A callback to fire when the urlbar button is clicked. Is called with the HTML page as its context and with the URL of the page as its first parameter.
 </api>

lib/urlbarbutton.js

@@ -101,6 +101,9 @@ UrlbarButton = function (options) {
         button.className = "urlbar-icon";
         button.collapsed = true;
 
+        if (options.tooltip) {
+          button.setAttribute("tooltiptext", options.tooltip);
+        }
         if (options.image) {
           button.setAttribute("src", options.image);
         }