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New version of Firecookie is now available. It includes a few bug fixes and bunch of new features. Thanks for all the ideas and comments you have posted!

This version is intended as beta and I would like to keep it here for some time. Even if it's quite stable, I would appreciate some testing and make sure everything works fine. As soon as I get positive feedback, I'll move it to Mozilla add on site. The review process will be easy then 🙂

Download Firecookie 0.5beta5 (Latest Beta Version, compatible with Firefox 3 RC1)

Firecookie home page
Firecookie on (Latest Version: 0.6 - Pending Review)

New features in v0.5 since v0.0.5 - big step ahead 😉 :

  1. List of cookies can be sorted by clicking on a column header (0.0.6).
  2. Click on a cookie event (cookie name) in the Console tab navigates the user to Cookie tab. (0.0.6)
  3. Cookies from all sub-domains of the current domain are displayed. (0.0.6)
  4. There is a new column with cookie size.
  5. The list can be filtered by cookie path (a filter option). So, only cookies matching the current path are displayed.
  6. Rejected cookies are displayed too (a filter option).
  7. Cookies from redirected domains are displayed too. This is useful e.g. in login systems, which can redirect the user over different domains while setting cookies.
  8. Cookies set from embedded iframes are displayed too.
  9. Columns in the cookie list are resizable. It's persistent and can be reset from context menu of the header.

And of course, if you would have any further ideas or comments please let me know! Especially the UI design is always tough (and your observation could have impact even on other features in Firebug). For instance, I am not sure about the way how the filtering is done...

I have finally got some time to write another piece of the tutorial. This time I’ll explain how to use an Options menu that is available in every Firebug’s panel. This menu is located at the right side of a tab-bar.

See an example of Console Options menu from Firebug 1.1

The main purpose of the menu (as the name clearly indicates) is to expose panel-specific options (preferences), so the user can access them and change theirs value if necessary.

Simple example

The menu is already built within Firbug’s UI. So, all we have to do is to provide a content. This is done by getOptionsMenuItems method that must be implemented in the specific panel object (i.e. HelloWorldPanel in our case).

function HelloWorldPanel() {}
HelloWorldPanel.prototype = extend(Firebug.Panel,
    // . . .
    getOptionsMenuItems: function(context)    {
        return [{
            label: "My Menu Item",
            nol10n: true,
            type: "checkbox",
            command: function() { alert("Hello from the Options menu!"); }

This method is called by the framework when the user clicks on the Options menu - just before it’s displayed. Each object returned in the array represents a menu-item. Following properties are supported.

label (string) The label that will appear on the menu item.
nol10n (boolean) Indicates whether the label should be localized. *)
Specifies type of the menu.
checked (boolean) Indicates whether the element is checked or not.
disabled (boolean) Indicates whether the element is disabled or not.
image (image URL) The URL of the image to appear on the menu item.
command (js-function) java script menu item handler.

*) This is only for strings coming from file. Should be always set to true for third party strings.

Real options

Let’s develop more useful example that uses the menu for real options (preferences). First of all, we’ll define default preferences ...

pref("extensions.firebug.helloworld.option1", true);
pref("extensions.firebug.helloworld.option2", false);

... and put them into a prefs.js file, which is located at proper location within extension's directory structure.

Now, see new implementation of the getOptionsMenuItems method, which displays both new preferences and makes possible to change theirs values.

function HelloWorldPanel() {}
HelloWorldPanel.prototype = extend(Firebug.Panel,
    // . . .
    getOptionsMenuItems: function(context)
        return [
            this.optionMenu("Option1", "helloworld.option1"),
            this.optionMenu("Option2", "helloworld.option2")

    optionMenu: function(label, option)
        var value = Firebug.getPref(Firebug.prefDomain, option);
        return {
            label: label,
            nol10n: true,
            type: "checkbox",
            checked: value,
            command: bindFixed(Firebug.setPref, this, Firebug.prefDomain, option, !value)

As you can see, there is a new helper method optionMenu that creates a menu-item object. The method takes two parameters: a label and a preference name.

Notice that menu-item-separator is created just with simple "-" string.

The most interesting thing is probably the implementation of optionMenu method. First of all, we are utilizing get & setPref methods from Firebug namespace:

Firebug.getPref(prefDomain, name);
Firebug.setPref(prefDomain, name, value);

This example considers Firebug 1.2 (these methods are different in 1.1).

The usage is quite obvious. The first parameter is used to specify preference domain, the second specifies preference name and the third - new preference value. The domain should be "extensions.firebug" (there is a constant Firebug.prefDomain for that).

Further, there is a new bindFixed method. Could sound familiar to you as this pattern is often used in JS libraries (e.g. Prototype). In this example, bindFixed is used to bind a method (Firebug.setPref) to a handler (command), with three parameters (Firebug.prefDomain, option, !value).

The source code is worth a thousands words, so here is how the method looks like:

Firebug.bindFixed = function()
    var args = cloneArray(arguments), fn = args.shift(), object = args.shift();
    return function() { return fn.apply(object, args); }

Finally, if you want to test it, don't forget to open the about:config page in order to see how the preference is changing.

The extension can be downloaded here (you need Firebug 1.2 ).