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I couldn't miss this nifty extension in my series of posts about Firebug extensions. It's a small plugin focused on one thing and working great!

This extension is compatible with Firebug 1.12 (will be released in couple of weeks).

FirePicker adds a small color picker dialog when editing a CSS rule in Firebug. The addon scans for values that can be parsed as CSS colors and displays them in a drop-down list right below the firebug's CSS editor box. Clicking on the color value in the drop-down brings up a color picker dialog.


Another Firebug extension we have tested with upcoming Firebug 1.12 (will be available in several weeks) allows managing web storage directly in your Firebug.
FireStorage Plus! appends an extra Firebug tab which lets you inspect and modify the local and session storage.


FireQuery is one of my favorite extensions for Firebug and I am regularly using it every time I am debugging web application that is build on top of jQuery.
FireQuery is a Firebug extension for jQuery development. It's a collection of Firebug enhancements for jQuery.


Another nice extension I would like to mention is related to server side logging: FireLogger

FireLogger implements simple yet powerful server side logging (similar to console.log on the client side). It creates a new panel (a logging console) in Firebug UI that displays logs coming from the server.

Logs are sent to the client side over HTTP headers. The extension supports PHP and Python scripts.

You can dowload it from AMO.


There are many Firebug extensions implementing new nifty features for Firebug and its great to see that new ones are still coming.

In this post, we'll take a quick look at one of them: Console Export.

ConsoleExport is a Firebug extension (you need Firebug 1.6+) that allows exporting logs from the Console panel. The export can be done manually through an Export button (see the screenshot below) or automatically by sending every log to the server.


Firebug (and also Web Inspector) allows to label dynamically evaluated scripts using a special directive. The directive is a simple comment that is appended to the bottom of the evaluated script.

//@ sourceURL=foo.js

Such label is important especially for debuggers displaying list of scripts available on a page and so, developers can pick the right script see the source code and eventually create a breakpoint.

In order to avoid IE JS conditional compilation issues, Firebug will also support new syntax:

//# sourceURL=foo.js

This support will be available since Firebug 1.11.5 and Firebug 1.12 alpha 7


Syntax of the directive needs to match this regular expression:



Firebug 1.12 alpha 6 introduces one new feature called simply: Use in Command Line

This feature allows referring various page objects (HTML elements, JS objects, network requests, cookies, etc.) from within Firebug Command Line.
The user can also use object's properties in JS expressions.

See issue 6422 for more details.

This post explains the feature in detail and also asks for feedback.


One of the new features introduced in Firebug 1.12 alpha 5 is a filter for DOM event logs (issue 229).

Logging of DOM events has been available in Firebug for a long time and the filter should make it more useful and effective in daily usage.

The problem is that we are unsure whether UI/UX of the filter is implemented properly.

So, if you are using this handy feature please read further and let us know what you think (leave a comment below).

I had an opportunity to be a reviewer of a new book about Firebug written by Chandan Luthra. This is actually the second book dedicated to Firebug and so, you might also be interested in the first one.

The book is labeled Instant Firebug Starter
Monitor, edit, and debug any web page in real time with this handy practical guide.


Firebug UI is entirely based on XUL/HTML/CSS and so, it's easy to provide a new set of CSS styles (a theme) that modifies Firebug UI and adjust it to your needs and preferences.

One of the typical examples of such modification is changing the background color (dark vs. white).

This post explains how to use Jason Barnabe's Stylish extension and apply arbitrary CSS on Firebug UI.

Thanks to Luís who mentioned this!


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